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10.5: Create a three-partition Boot Camp setup
Authored by: cstgermain on Sep 25, '09 04:06:30PM
I just managed a triple boot setup on a new MBP. I now have Snow Leopard 10.6.1, Leopard, 10.5.8, and Windows 7 RC and can boot easily to any of them with the option-key at power on. These are the steps I followed:
1) I installed the windows 7 RC via Boot Camp as per this recipe:

2) Formated an external FW drive with 3 partitions: Clone, Backup, and Media.

3) Used Carbon Copy Cloner (CCC) to clone a 10.5.8 installation I have on a mac-mini onto an external FW drive. (Even though I have a Leopard family pack install disk, you can't boot from it - at least I couldn't and anyway, most of what I wanted was on the mini anyway).

4) Used Time Machine to backup the 10.6.1 onto the FW drive Backup partition (I guess I could have used CCC but I was familiar with Time Machine and not with CCC until today).

5) Used WinClone to make an image of the BOOTCAMP partition on the external FW drive (just in case)

6) I booted the MBP from the Clone of 10.5.8 to make sure it would work and that there would be no driver issues (trackpad etc) - it worked just fine.

7) Now comes the scary part: (I have read a lot of posts about the challenges of doing a triple boot with a Boot Camp Windows partition already installed that result in XP or Vista not being bootable. Lots of folks have found workarounds to solve this I know). With the machine booted from the clone of 10.5.8 -RUNNING ON THE EXTERNAL FW DRIVE, I launched the disk utility and and resized the 10.6.1 partition to half what it was. (click on the 10.6.1 partition and then click on the + sign at the bottom left - this will allow you to keep the contents of 10.6.1 intact but free up some space). Call the new volume whatever you like and format it Mac OS Extended (Journaled).

8) Used CCC to copy the clone of 10.5.8 onto the new partition created in step 7.

9) Shut down and Power-up with the option key and all was well. All three OS's available. No modification of the Windows 7 bootmgr or any other boot parameters.

10) Boot to the 10.5.8 partition and change the computer network name to something else other than the name of the mini.

Worked for me and wasn't as difficult as some of the other approaches.

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