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Audio CDs not recognized on 10.0.2 System
I've had three separate people report the same problem with Audio CD's following the 10.0.2 and iTunes update. Here's a typical story:

"I just encountered a very strange problem. I inserted an audio cd in my drive under OSX and got a dialog box that said "this disc conatins data unrecognized by OSX" and gave me 3 options...eject (default), initialize and continue.

eject is obvious.
continue makes the cd inacessable (although the tracks show up in the Audio CD player dockling, but it will not play nor eject)
initialize has virtually the same affect as continue only the songs don't appear in the dockling "

If anyone can shed light on this (somewhat widespread?) problem, I'm sure there a number of users who would be quite grateful. My machine has continued to work just fine, so I can't add any personal experience to this issue...
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Fix for 10.0.2 'Optimizing' failure System
There have been some reports that the "Optimizing" step of the 10.0.2 update is failing for some people. It starts, but then just sits in the same spot for literally hours. A couple of different spots on the web are now reporting one possible source of trouble - an invisible file from Aladdin Systems. If your optimization fails, try this:

Boot into 9.1, and use Sherlock to find invisible files in the 9.1 System Folder that contain the word "Transaction". You may find one or two files named "Aladdin Transaction Info" or some variation on that name. If you do, delete them. Now reboot into X and try the update again; it should work fine, at least according to the reports I've seen.
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Sleep prevention due to screensavers System
My iMac would never sleep with the sleep options set in Prefs Panel. However, by simply choosing BLACK BASIC in the Screen Savers pref panel, now the iMac spins down HD after 5min and full pulsating sleep after 10min of inactivity. It seems running regular Screen savers keeps the video card busy and interferes with normal operations.. this is a G3 400DV, 320mb RAM, 10gb HD, stock.

[Editor's note: Wish I could help verify this, but I use a SCSI card, so I can't sleep the machine!]
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OS X 10.0.2 update out System
Software Update has just given me the OS X 10.0.2 release, along with iTunes 1.1.1. I haven't had much time to use either package (it's only a lunch HOUR, unfortunately!), but here are a couple quick observations...

1) If you'd like to back up the packages before you lose them (they get deleted on restart), open a terminal and
cd /private/tmp/501
cp -R 10.0.2Update.pkg/ ~/Documents/newname
cp -R iTunes.pkg/ ~/Documents/newname2
Of course, you can use any destination and name you like, and you need to do this after the packages have installed but before you select restart in the installer.

2) iTunes now has a dockling that includes "Bring to front", "Quit", "Play", "Stop", "Pause", "Next Song", and "Previous Song" (or "Open iTunes" if it's not running). It also runs visuals full screen, and (of course) includes burning!

3) From looking through the installer files (after install, run the installer package in /Library/Receipts, proceed to the "Select Destination" step, then under the File menu, pick Show Files; quit the installer when done reading) it appears that there were updates to mail.app, the login panel, audio drivers, and a whole slew of other drivers (including possbily SCSI?).

The updates are available through the Software Update panel in OS X, and as standalone downloads from Apple.
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Security alert for 'sudo' System
Today over at stepwise.com, they posted an article explaining a buffer overrun security hole in 'sudo', which is included with OS X. After you've read the article, you can either download an updated sudo installer, or build it yourself by doing the following in a terminal window (requires an admin account and the developer tools installed):
mkdir build-sudo
cd build-sudo
wget http://www.courtesan.com/sudo/dist/sudo-1.6.3p7.tar.gz
gnutar -xzf sudo-1.6.3p7.tar.gz
cd sudo-1.6.3p7
cp /usr/libexec/config.* ./
./configure --with-password-timeout=0
--mandir=/usr/share/man
--prefix=/usr
make
sudo make install
This update is highly recommended for all users, but especially those with a full-time internet connection and no firewall! ;-)
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Use old system sounds in X System
If you'd like to take some of your old System 9 alert sounds and use them in OS X, it's apparently fairly easy. I had this snipped from somewhere, and never got around to posting it. I have NOT tried this on my machine (haven't been in OS 9 lately!), so use at your own risk (but it doesn't look too dangerous).

Simply boot into OS 9.1, run the desired sound through a sound conversion program (perhaps Sound Converter Pro) to make it an AIFF format, and then drop it the into /System/Library/Sounds folder. When you reboot into OS X, the sounds should be available.
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Empty all trash cans at once System
Being inherently multi-user, OS X creates a trash can for each user. There's no simple (GUI) way to empty all of these trash cans. Even if you're logged in as root, you have to remove each one individually. Over in this MacNN forum, however, 'MickS' posted a one-line terminal command that will empty all of your trash cans at once. Warning - this is not un-doable, and you won't get any 'Are you sure?' messages before the trash is emptied.

To empty all the system trash cans at once, start a terminal session and type
sudo find / -name ".Trash" -type d -print | xargs rm -fr
You'll have to enter your admin password, but then it should just run. NOTE: I have not tried this myself yet, so use at your own risk.
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Run an AppleScript from the command line System
Want to run an AppleScript command real quick from Terminal? It's easy!

1. Run "osascript".
2. Type your script, for example:
tell application "Dock" to quit

launch application "Dock"
3. Type Control-D when done.

You can also supply a filename to "osascript" to run the script inside, and you can compile—but not run—script files using "osacompile".
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Can't find Classic on 10.0.1 System
Background first: These symptoms did not occur until I updated to OS X 10.0.1.

I'm working on a iBook 466/192MB - OS X 10.0.1 and 9.1 on a single partition.

When I select OS X in the Startup Disk Control Panel (while in OS 9.1) I am warned that there is no system folder selected and that unpredictable things may happen.

If I reboot, OS X boots fine. Selecting Classic in the System Preferences provokes the notice that there is no MacOS 9.1 or later installed anywhere (I've got three now) so Classic cannot start. I've reinstalled OS X (& the update - 10.0.1), reinstalled 9.1 and rebuilt the desktop (in 9.1, not Classic). I can still select OS 9.1 as the startup disk from System Preferences.

I'm at a loss here. I need Classic to run some everyday stuff. Any ideas?
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Understanding the OS X architecture System
I would normally just post this as a 'link', but it seems a bit more important than that. If you're having trouble understanding the "language of X" (Carbon, Cocoa, Classic, Quartz, etc), Apple has put up an incredibly easy-to-understand one-page snapshot of the whole system.

http://developer.apple.com/macosx/architecture/

This really helps visuall lay out the structure of X, and explains all those buzzwords you've been hearing lately (mouse over each button for the details). I found the link in one of the MacNN discussion boards, posted by 'StarfleetX' .
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