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10.5: Install on a PPC Mac from an external USB Drive System 10.5
Leopard only hintAfter doing a lot of research and trying out some hints, finally I could install Mac OS X 10.5 Leopard on an iMac G5 1.8 GHz, and I would like to share with you the solution that I got.

This works for PowerPC Macs that don't have a Dual Layer DVD, and you wish to install Leopard using an external USB Drive instead.

1. Start by creating the disc image of the installation media (this can be DMG, CDR, ISO or any of the disc image formats supported by Mac OS X). In my case I used an external DVD (Dual Layer) drive with the Installation media to make the image -- because the system doesn't recognize that drive in the Startup Manager (when I restart it while holding down Option key), neither was listed at System Preferences » Startup Disk.

Note: you can skip this step and make the restore directly from the DVD -- just dragging the DVD into the Source field -- explained in step 4.

2. Connect your external drive and launch Disk Utility.

3. Select the drive in Disk Utility and then select the Partition tab. Make sure that the drive is formatted using an Apple Partition Map scheme, not GUID or MBR (you may need to reformat your drive to get it in this form). Once the drive is in the Apple Partition Map scheme.

4. Select the Restore tab of Disc Utility and drag the Disk Image (or the DVD in case you have an external drive) for the Installation Media onto the Source field.

5. Then drag the appropriate partition (in my case, the USB external drive) to the destination field.

6. Click on restore. This may take a while to complete.

7. Determine the partition where your bootable image it situated (e.g. an MacOSX DVD or DMG restored to a partion with Disk utility's restore). This might be disk1s3 in which case the partition number is 3. Also you can check it on Disk Utility, select the hard drive -- right click on it and select 'Information,' and write down the 'Partition Number.'

8. Restart your iMac while holding down Command+Option+O+F. This will place you in Open Firmware.

9. Type dev / ls to get the device tree list.

Look for something in the output like:
/usb@b
/disk@1
As we're talking about a tree here, write down the complete path to this node. In my case it would be:
/ht/pci@2/usb@b/disk@2
10. Type devalias ud /ht/pci@2/usb@b/disk@2. In other words: make 'ud' equal to the path you found in step 9.

11.Now verify you got the right disk:

dir ud:3,\

(3 is the partition number you wrote down in step 7). And look for a file with tbxi attribute, probably in:

\System\Library\CoreServices\BootX, e.g.:

dir ud:3,\System\Library\CoreServices

12.Then boot from it:

boot ud:3,\System\Library\CoreServices\BootX

13. Wait a little bit while the iMac restarts and if you see the Leopard Installer begin, you're done.

[crarko adds: This was a complex hint to edit, and while I tested some of the Open Firmware commands on an iMac G5, it is possible you will need to adjust some of the items depending on the PPC hardware you're working with. I think all the front slash/back slashes are correctly placed, but if any are misplaced please note this in the comments and I will correct them.]
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10.5: Install on a PPC Mac from an external USB Drive
Authored by: Asmus Vierck on Oct 20, '10 10:34:23AM

… or you could simply clone the Installation DVD to an external (FireWire) hard disk and boot from that.



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10.5: Install on a PPC Mac from an external USB Drive
Authored by: Magnus Dredd on Nov 12, '10 11:29:07AM

That only works if you own one.

Furthermore, it's not like optical drives never fail...


Being able to boot from a USB keychain-style flash drive is a seriously useful thing.

This not only allows for installations from USB drives (flash or otherwise), but running repair/recovery utilities from them as well.



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10.5: Install on a PPC Mac from an external USB Drive
Authored by: LordGilman on Oct 20, '10 11:03:47AM

This is also how you boot Linux from any kind of USB drive or flash stick on these macs. However, the "\System\Library\CoreServices" path needs to point to a file named "yaboot" which is usually lurking in the root directory or in /boot. I was able to use this method earlier in the weekend to get Ubuntu and Debian LiveCDs to boot off of a flash drive.



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10.5: Install on a PPC Mac from an external USB Drive
Authored by: earthsaver on Oct 20, '10 05:00:49PM

Wait, I'm confused. I've never had trouble installing Leopard on a PPC Mac that didn't have a Dual Layer SuperDrive, or even a Mac only containing a Combo Drive. A modern SuperDrive is only required for burning Dual Layer discs. Any drive that can read DVDs can read one with multiple layers.

---
- Ben Rosenthal
MacBook Pro 2.8GHz - Snow Leopard



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10.5: Install on a PPC Mac from an external USB Drive
Authored by: NeoX on Oct 24, '10 08:35:06PM

What Ben said! I don't get it either. An iMac with any type of DVD drive included, even a combo drive should be able to read a Dual Layer disc. That is a DVD standard from the beginning, after all. Now writing is another issue.



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10.5: Install on a PPC Mac from an external USB Drive
Authored by: PowerB00k on Nov 28, '10 10:04:11AM

This saved my day!! I have a late-model 1.67GHz Powerbook which was ruined beyond Disk Utility's reach, due to a frozen OS update that forced me to power down. I have no Firewire drives, Time Machine backup, blank DVDs, etc. All I had was a Leopard DMG sitting on my windows box and a 8GB USB drive laying around. I was successfully able to use this method to restore my computer and sanity!

Here are some tidbits from my experience:
-The USB had to be formatted as MACOS Extended, not Journaled. Otherwise, I only had 6.4GB usable space for a 6.7GB DMG file.
-The restore step took about 20min for me, as did the OS installation (trimmed of language and printer driver options)
-For me, the location of the bootable USB was /pci@f2000000/usb@15,1/disk@1. I mention this because the ",1" was easy to miss on my machine and was needed.
-The BootX location provided in this post was spot-on for my 10.5.6 image.

I can't thank you enough for the time and hassle you saved me! Also, it was fun using OF mode for the second time.



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10.5: Install on a PPC Mac from an external USB Drive
Authored by: freespace on Feb 20, '11 04:15:35AM

Just followed this guide to get 10.5 installing on a G4 mac mini. Gold advice!

Some notes: I created a CDR of the install DVD, but was unable to restore with it. I ended up re-partitioning my USB stick using Apple Partition Map, then restored the DVD on it directly.

FWIW, using a non-apple KB with the windows key it was ctrl-win-o-f to get openfirmware up.



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10.5: Install on a PPC Mac from an external USB Drive
Authored by: marlowwilson on Nov 26, '11 09:58:15AM

The above post saved my behind: PPC Mac Mini G4

-For me, the location of the bootable USB was /pci@f2000000/usb@1b,1/disk@1.The ",1" was indeed very easy to miss on my machine and was needed.
-The BootX location provided in this post was spot-on for my 10.5.X image - I'm not sure what it was but I believe it was a very early CD I made the image from.

OSX is installing now!

Many thanks!



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10.5: Install on a PPC Mac from an external USB Drive
Authored by: will11 on Dec 05, '11 01:29:37PM

Dear Users,

I have spent days trying to install leopard and think this guide is extremely good but I have a bit of a problem. on step 9, every time i type in the command "dev / 1s", the mac then replies with "unknown word". I have also tried reversing the slashes and when i type "dev \ 1s" the mac replies with "can't find device \ 1s, unknown word". i have no idea why this is happening and would appreciate help from anyone who wishes to give it.

Thank you.

iMac g5, 1.6GHz, 768mb ram, Mac OS X 10.4.11 Tiger



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10.5: Install on a PPC Mac from an external USB Drive
Authored by: marlowwilson on Dec 19, '11 08:54:49PM

I think you're having an l vs 1 (letter vs number) issue.

Good luck!



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10.5: Install on a PPC Mac from an external USB Drive
Authored by: davidh86 on Dec 19, '11 09:11:50PM

the command is dev / ls as in lower case L s



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10.5: Install on a PPC Mac from an external USB Drive
Authored by: DJarkinian on Dec 29, '11 01:36:34PM

Hi,
I have a problem in the "Open Firmaware" step. I did the right command "dev / ls", I identified my pci and my usb, but when I type the entire command e.g "/ht/pci@2/usb@b/disk1/" , the command prompt says this :
/ht/pci@2/usb@b/disk1/, unknown word, HERE= ffa08928
Could anyone help me ?
Thanks.
(Sorry if my english is bad, i'm french)



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10.5: Install on a PPC Mac from an external USB Drive
Authored by: chrisall on Jan 07, '12 11:08:48AM

Hi, I can't seem to get this to work:

My path is /pci80211@1/usb@b,1/disk@1

The devaias ud [path] command seems to work

The dir command errors with "can't open the DIR device" It doesn't matter what I put after the ud, even dev on it's own errors the same.

Cheers,
Chrisall



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10.5: Install on a PPC Mac from an external USB Drive
Authored by: sbloch on Jan 17, '12 10:36:35AM

Seems to be working for me now: the 10.5 installer is running on my G4 tower. I set up a USB drive with nothing on it but the 10.5 ISO, so there were no partitions, so I needed "ud:,\System\Library\..."

I thought there might be a simpler way, considering that I already had 10.4 running -- some way to say "next time, boot from the USB drive" -- but I haven't found such a way.

In the meantime, I've learned about the existence of Open Firmware, started reading about it, and learned that it's a domain-specific dialect of Forth (who knew?!)



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10.5: Install on a PPC Mac from an external USB Drive
Authored by: gabrie on Jan 23, '12 12:32:56PM

Worked perfectly for me. First try.

In my case the device was: /ht@0,f2000000/pci@2/usb@b/disk@2

Thanks !!!

PS: The last minute of the installation takes for ever.
PS2: The reboot now takes for ever too :-)



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10.5: Install on a PPC Mac from an external USB Drive
Authored by: gabrie on Jan 23, '12 12:45:29PM

It seemed to work for me, but after waiting very very long for the last minute to pass, I then got the "ready to restart" screen. I pressed "restart now" and waited for 5min but it didn't reboot. So I pulled the plug. Powered on only to find a flashing folder icon.

Now trying a second time to install and will try to be more patient.

The path I had to use with devalias was:
/ht@0,f2000000/pci@2/usb@b/disk@2



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10.5: Install on a PPC Mac from an external USB Drive
Authored by: Tosh22 on Feb 05, '12 05:51:55AM

This is for anyone looking for a solution to installing Leopard on a Mac PPC that doesn't have a CD/DVD drive. I had the very same dilemma and after searching the internet for days, i stumbled upon the solution by myself.

Maybe it's obvious or maybe not, but all External USB Hard drives are really just SATA/IDE hard disks cased in a metal box and given a usb port!

Well, for this solution you will need any running version of Mac OSX leopard or snow, either on another mac, macbook or on the same machine you want to install in (if you're doing a re install)

Use this running version to create a Mac OSX 10.5 image to the the external usb hd (DISK UTILITY>RESTORE) Now Shut down the mac. Physically open the external USB Drive and take out the SATA disk inside. (you may need a screw driver)

Open the Mac case

Plug the SATA drive inside the mac you want to install in, alongside the normal SATA drive already inside the machine.

Start the machine while holding Option/ Alt until a menu shows up. And Voila! you can now install Mac OSX Leopard 10.5, and faster than a DVD install i might add.

With no DVD drive! No External Firewire drive! USB not an option because of PPC! But where there is a will the there is a way!



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10.5: Install on a PPC Mac from an external USB Drive
Authored by: DinoBob on Feb 10, '12 10:12:00PM

I am a PC guy for many many years but a complete Mac n00b. I got a G5 iMac from my brother-in law that had puked the hard drive. Of course, he had lost the install DVD in a flood this summer. Arg.

I obtained a disk image of the Leopard DVD, but experienced much frustration as the drive does not read dual layer DVD. I tried a pared-down disk image on DVD-R, but no luck there. It just hung at the Apple and pinwheel.

Ultimately, my solution also involved another Mac. I popped a new 500 GB SATA hard drive into a USB enclosure, connected to my Windows box, and placed the .dmg on it. I connected it to the Mac Mini, and copied the file to the desktop. From there, I just wiped the SATA drive using Disk Utility, and created two APM-formatted partitions- one 20GB to hold the image and leave some extra space, and another one using the rest of the disk. From Disk Utility, I verified and then used Restore to copy the image to the 20 GB partition. Since my G5 does not have the camera, removing the back to swap the hard drive was a cinch. At first it would not read it at all, and I then discovered that I needed to jumper the SATA drive to 1.5 GBps. Once I did that, I booted using the Option key, selected the image partition, and installed to larger partition. Bang!

For someone who has the very last iMac G5 with the camera, disassembly is more of an impediment. But getting to the guts of the earlier model could not be easier. Three screws on the lower edge of the unit and the back comes right off. If you have one of these this method is a slam dunk.



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10.5: Install on a PPC Mac from an external USB Drive
Authored by: jssilver on Feb 26, '12 10:43:42AM

Great post, many thanks. It was a real lifesaver. I had inherited an early model G5 with Tiger (10.4) and a single layer DVD drive. I managed to track down an ISO image of Leopard but couldn't figure out how to install it until I found your post.

A couple of clarifications that may help others:

Step 4: Drag the DMG file if that's what you have. (This may be obvious but I'm a Mac noob, so wasn't sure).

Step 7: You want the partition for the destination drive (the one you copied the image to in Step 4). The instruction in the original post is a little confusing.

Step 9: You'll see a long list. I had to go to the second page in the list to see my device. The root of the path was much longer than "ht" (something like "ht03,f2000000" - sorry, I didn't write it down). You have to use the entire string. In the example, "disk@2" is a child of "usb@b" - it will appear nested under usb@b in the listing (the example makes it look like it's at the same level).

Step 11: The first dir command only shows you the top level path. The second example is the one you want to use.

After installing Leopard, run Software Update to get further updates to the OS and other Apply software on your machine (Safari, iTunes, etc.). You may have to run Software Update a couple of times. to get everything.

Thanks again. My Mac is very happy to be getting this update.



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10.5: Install on a PPC Mac from an external USB Drive
Authored by: liamq on Apr 13, '12 05:33:57AM

hello there.

Great hint here really helpful. i have successfully done this on two of the imacs at work. however I am having trouble doing this on my mac pro G5

I have started up, same as the others, wrote down the tree, which is only slightly different, devalias the disk and the ud:3,\ which brought up a bit of info, exactly the same as the others so looks good. BUT when i then do the dir ud:3,\system\library\coreservices bit my G5 crashes! it does nothing and i can't do anything. really annoying as this is the one that is most in need of a good clean!

anyone know what might be the problem or experienced this themselves?

Thanks



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10.5: Install on a PPC Mac from an external USB Drive
Authored by: iconoplast on May 08, '12 09:13:46PM

Great Article.

I've already done this (thanks to this and other articles) back in February. I recently dropped my laptop again (doh!), and have had try to do this again.

Last time I succeeded, and this time I'm failing. The only difference in my method between last time and this is that I have a different external drive. Last time, I used a 160 gig desktop drive in USB enclosure, and this time I'm trying to use a WD 1 terabyte drive.

My trouble is that when I "dev ls", as per point 9. of this article, I don't get a "/Disk@1" showing up for the 1tb drive. Just to be sure it wasn't a different problem, I formatted a USB stick to Mac OSX Extended, and looked for it in Open Firmware, and it did indeed show up as a "/Disk@1".
(I restored the .dmg of 10.5 onto the USB stick, and tried booting from that, but my laptop kept giving me the "Circlebar" no-go symbol. Researching around on the web, it appears that flash sticks sometimes can't keep up with the computer's boot demands.)

Does anyone know why this would be? Like I said, nothing I've done has changed except the external drive.
One little difference I wonder about is that the first (successful) usb boot happened on a drive installed with Mac OSX Extended (not journaled), and the WD drive itself defies formatting that way.
When I try to format it as MOSXE using Disk Utility, I click on the physical drive in the left hand column, and it formats, creating a single partition on the physical drive, which it displays as a "child" underneath the physical drive. When I browse the physical drive again using Disk Utility (by clicking on the erase or partition tab), the WD physical drive shows up as MOSXE(journaled) and not simply MOSXE.
Could this have anything to do with why the drive won't show up under a usb device when I "dev ls" in Open Firmware?



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10.5: Install on a PPC Mac from an external USB Drive
Authored by: white13wolf on May 14, '12 01:23:37PM

YOU RULE

the path is hard to find the tree is not perfectly displayed

it dose go /ht@0,f2000000/pci@0/usb@b/usb@2/disk@2

the pci seem to be in a sub folder to something different

I GOT a PPC iMac G5 (the last one made) the super drive is busted some cd's and dvd's work some don't as the case with my os x install dvd

If you are a girl i love you, if boy the next round is on me

THANK YOU AGAIN
and by the way English is not my first language (just in case you were wandering)



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10.5: Install on a PPC Mac from an external USB Drive
Authored by: jas2012 on May 16, '12 09:17:59AM

Thanks for this! I've been trying to install Leopard on my PowerBook G4 for days. Worked like a charm!



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10.5: Install on a PPC Mac from an external USB Drive
Authored by: wonderlover on May 29, '12 03:16:44PM

I am having some issues.

When I get to the point to verify the correct disk ... I get this message
"MAC-PARTS: specified partition is not valid can't OPEN the DIR device"

Can someone HELP me???



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10.5: Install on a PPC Mac from an external USB Drive
Authored by: wonderlover on May 29, '12 04:47:10PM

When I type in "dir ud:3,\" (where the files are on partition 3 of my usb drive) and hit RETURN, i get a response of..."can't OPEN the DIR device"

can someone please help??



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10.5: Install on a PPC Mac from an external USB Drive
Authored by: hdhu on Jun 17, '12 04:50:30AM

hey guys!!!! after a few tries, I FOUND A SOLUTION. my powermac G5 is now on the nice 10.5.6 :)))
HERE'S A GUIDE FOR ALL THOSE OF YOU, WHO ARE STILL STUCK WITH THE GUIDE ABOVE:

1. if you are completly new and have no torrent downloader, download vuze. its a nice, small, free torrent downloader and it works :)

2. after that, you have to download the iso file. i chose the one on www.picktorrent.com/download/b7/173126/mac-os-x-leopard-10.5.6-full-retail/
it should work...
if everything is done, a folder "vuze downloads" should appear on documents. open it and go to mac os x install dvd. inside should be a dmg file.

3. plug your USB stick (8GB, better more) into the computer. the file system should be set to MAC OS X EXTENDED (NOT journaled)

4. follow the guide above from step 3 til step 8.

5. you're now in open firmware. type in dev / ls and a list with all files will appear. press space to scroll down. now, you have a tree structure, you have to choose the leftest and go to right and bottom, till you reach
/usb@b
/disk@2

(it don't have to be exactly like that)

then write down the whole path
(in my case ht@0,f2000000/pci@8/usb@b/disk@2)

6. write devalias into the command prompt. it should appear a list. you have to search the USB. (in my case USB2,USB3,USB1a,USB1b,USB1c) then I guessed that it would be USB2.
my choice was the right, if your one isn't the right it will nothing happen in step 7.

7. type dir (name_found_in_step_6)/(disk_name_found_in_step_5) :(partition_number_found_in_step_7_of_the_guide_above),\System\Library\CoreServices (in my case dir usb2/disk@2:10,\System\Library\CoreServices)

8. now a list should appear with the programs inside this folder. if a program with the name BootX and the atribute tbxi is there, you're almost done. type in boot (name_found_in_step_6)/(disk_name_found_in_step_5) :(partition_number_found_in_step_7_of_the_guide_above),\System\Library\CoreServices\BootX

9. press enter. the installation should now begin.

10. ENJOY YOUR FREE LEOPARD!!!!! :D

so it worked for me. i hope for you, too and for questions just ask me: fritzmeier83@gmail.com

(PS: sorry for my bad english, i'm from switzerland :)



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10.5: Install on a PPC Mac from an external USB Drive
Authored by: ants.gi on Sep 29, '12 11:29:18AM

thank you very much all!!! specially hdhu!!!!!



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10.5: Install on a PPC Mac from an external USB Drive
Authored by: hdhu on Dec 08, '12 06:33:33AM

I'm glad that I could help you :)



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10.5: Install on a PPC Mac from an external USB Drive
Authored by: restless on Dec 07, '12 01:43:42PM

I'm on a powerbook 1.33 GHZ with a burned firewire and need to upgrade to leopard.

I am using an external USB drive 8 GB with only Leopard on it (partition 10)

I did a pram reset.

in OF my disk pattern is pci@f2000000/usb1b,1/disk@1

By "devalias"the above pattern corresponds to usb0

following the post to my case I get

dir usb0/disk@1:10,\System\Library\CoreServices fails ..

any help !?

thank you



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10.5: Install on a PPC Mac from an external USB Drive
Authored by: hdhu on Dec 08, '12 06:37:52AM

Uhm... that's strange, did you try out also the guide of ruth gaudi? If nothing works, it could be cause of the powerbook... this guide is for a powermac and I dunno if it works on a powerbook, too. I don't own a powerbook so I can't try it out... I'm very sorry, ask google for how to upgrade a POWERBOOK to 10.5, I can't help you :(



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10.5: Install on a PPC Mac from an external USB Drive
Authored by: razzo on Jul 03, '12 11:13:47PM

I need help! im a Mac noob
i get stuck at step 11
when I type dir ud:3, \
it keeps saying can't open the dir device
i went back and kept trying to see if my paths are wrong
but im not sure cause i get the same response.
one time i got can't open: mac-io/ata-3@20000/@0:3, \\tbxi
cant open device or file
Help please!



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10.5: Install on a PPC Mac from an external USB Drive
Authored by: hdhu on Jul 12, '12 04:15:17AM

look at my guide above, this worked for me :)
and btw, with ruth gaudis guide i'd the same problem like u...



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10.5: Install on a PPC Mac from an external USB Drive
Authored by: eduarddragunov on Jul 18, '12 10:10:33PM

Thank you so much, I am glad this popped right up on Google after a furious search for a solution to this problem. I've been so busy with work that I couldn't stomach the time or patience to search for the solution until an Arizona RX Energy drink and 2 hours later I finally stumbled across this god sent article. I would LOVE to make a video to help out those having problems with this tutorial and of course credit will be due! Whomever you are, I owe you many beers or whatever it is you like to eat or drink. Thanks again this is something everyone should definitely know for those working on some of the older G5's and G4's. I followed it exactly and it worked fine only difference is when I tried looking for the bootx it didn't find it at all but I still used the complete command and it worked as it should took some time rebooted itself and blamn! I thought I'd never see the installation screen!!! Used a 10.5.4 .dmg for the transfer onto the removable sata drive.

I forgot to mention I did this on a G5 with 1.6ghz and 512ram worked perfectly.



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10.5: Install on a PPC Mac from an external USB Drive
Authored by: snatch on Aug 27, '12 09:32:19PM

I have a G5 Imac 2 GHz machine with a faulty cd drive. I tried the hint and although all steps were correct once I got to 'boot ud:3,\System\ etc '.. it always replied ' unknown word, HERE= ff9dfb71 ' .

So I ended up a formatting an external HD with 2 apple partitions. One used to restore an image of Mac os x 10.5 and the other one free, hooked it up via target disk mode from another Mac, re-booted it up pressing 'c' and it worked for me.

This was the only way after numerous attempts of target mode and Open Firmware failures



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10.5: Install on a PPC Mac from an external USB Drive
Authored by: resolor91 on Oct 20, '12 05:32:24PM

after countless hours of trying i finally got this to work on my imac G5 august 2004 1.6Ghz model... all i had to do was update my ram to atleast 512 MB then the installation ran flawlessly



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10.5: Install on a PPC Mac from an external USB Drive
Authored by: Soum on Nov 18, '12 07:57:03PM

To everyone failing with dir and boot commands:

1 - Reset your PRAM with Cmd + Option + P + R.

2 - Follow this Guide.

3 - ??

4 - Proffit!



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10.5: Install on a PPC Mac from an external USB Drive
Authored by: seedyheron on Dec 12, '12 09:38:25PM

Ooh my GAWD. I am SUCH a noob to all things Mac. I bought this li'l PPC or G4 thing, as you guys call it. I call it an old-as-hell, boxy white thingy, pre-intel that hopefully will help me teach myself the basics of Mac before I drop $4K on a whole system. It is a little difficult to run Logic and Final Cut Pro on this computer with 10.4, so I upgraded the RAM and still nothing. Then I needed to upgrade OS's - um - how the HELL do you squeeze 6G on a DVD? Windows is not real keen on dual whatever - as far as I have experienced, so I needed to boot form USB. YOU SAVED MY LIFE, well saved a lot of headaches, at least. You sure as hell made things a lot easier. I did not even know what a "node" was in the instructions, but they were so well written and concise with examples, it made it virtually impossible to screw up. I am booting up and installing 10.6 as we speak and will be a Mac Diva before long. Thank you SO much. You really do not know how much I appreciate the amount of time and revisions it had to take to make such an excellent tutorial. Bravo!



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10.5: Install on a PPC Mac from an external USB Drive
Authored by: shybear on Mar 02, '13 03:09:19PM

Great tutorial, with it I worked around for 2 hours but finally I was able to upgrade my G5 from Tiger to Leopard.
Maybe it could be a bit well described how to sort out the correct path tree when you're into Open firmware, but everything is really well described.
Don't be surprised if partition number may vary in my case it was 10 and at first I was thinking that I made something wrong, but it was correct.
Take care to write exact commands, because i.e. if you type wrong the USB path tree, it may give OK anyway but when you ask for DIR you get back an error, it drove me crazy and finally I found that I was writing pc@2 instead of pci@2 !!!!

Oh for people that arent' use an Apple keyboard to access Open firmware press: ALT + Windows key + O + F.



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10.5: Install on a PPC Mac from an external USB Drive
Authored by: sorryman101 on Mar 19, '13 09:41:52PM

Please help and sorry I don't understand some of it please don't throw a rock at me.

I don't see anything but pci@2000000 then I see /usb1b then see /disk1
is my ud pci@f2000000/usb@b1/disk@1

I am sorry to ask but I don't know what my " UD" is and I don't have "ht" anywhere either.
when I type "devalias pci@f2000000/usb@b1/disk@1 " I get no alias

I am new to this and trying it from usb flashdrive

I have imac 1.2 ghz 512mb no disk drive that works
I have 10.4.11 installed trying to go to 10.5 if I left anything out you need to know ask me.



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10.5: Install on a PPC Mac from an external USB Drive - extra devaliases
Authored by: hfelton on Apr 23, '13 06:58:48AM
howdee - im a new user, but registered for just this one long/detailed comment/reply...

0 - THANK YOU to all who came before on this hint/thread/comment... i am just standing on top of the giants before and adding my little comments for others...


1 - i could not make a windows-keyboard work... in particular, my imac (g5) would 'ask' about it when powering up by having me press the key 'just inside of shift key' on each side... thus, i was never able to make the keyboard-combo work correctly... if you cannot get into open-firmware, then try getting a normal MAC-keyboard...


2 - i was having all sorts of problems trying to get the correct device to use for the 'dir' command... i could see the tree of information, but could never make a working 'devalias' for myself... two clues:

  • a - if (when you type devalias xx yyy@yy\yy\yy\yy) you receive a comment 'no alias' in response, then it did NOT work... you should see a 'good' response of just the word OK... even so, i was never able to 'use' my own devalias...
  • b - i noticed in one of the later-comments someone had tried just typing the word 'devalias' without anything else... when i typed that, i got a nice long list of predefined aliases... in particular, i could see one called 'first-boot' that looked like it should access my working tiger-hdd internally... also, if i just typed 'boot' it would do what youd expect [boot from the first-boot device, which is the current internal hdd]...


    3 - i was finally able to get things working better by doing/trying the following (details removed for hopeful-clarity):

  • dir first-boot/@0:3,\
    - and i finally saw something good... nb, i needed the exact-extra-characters listed [7 chars starting with / and ending with \] to get a 'good' dir... and i assume others will have the devalias of 'first-boot' predefined like i did...
  • dir usb0/@1:3,\
    - was the magic incantation i used for getting to my external-usb-key [8gb formatted/dmg-restored as needed]... in particular, the '1:3' here on usb0 and the '0:3' with first-boot matched the disk:partition information i got when i looked at the key using the regular get-info command from tigers disk-utility...
  • i could do a more-detailed 'dir' on the key until i got to the ...\CoreServices directory level... i could NOT actually do a 'dir' on the BootX file itself... but the CoreServices directory showed the 'magic' tbxi flag on that BootX file that i expected to see...
  • i could use the 'UP-ARROW' to repeat the last command that id typed, so that i could just change the 'dir' to a 'boot' and add the BootX to the end and it would work... (using left- and right-arrows to leave the other good characters in place)


    4 - once i got my magic incantation correct, it took prolly an hour to get thru the first-boot - but eventually i got the great happy-mac sound from the other room... hopefully you will be able to too... :)


    repeating: for me, the exact command i used was
    boot usb0/@1:3,\System\Library\CoreServices\BootX
    ... gl & hth, h.

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