Aug 05, '11 07:30:00AM • Contributed by: heymike
As always, Make sure you have a backup of the original install! This worked for me, but always be prepared for the worst.
I made, and used, a Lion Mac OS X Install ESD on a thumb drive. Instructions to make one can be found all over the Mac centric web sites. Then follow this procedure:
- Put the unsupported Mac in Target Disk mode and plug it into a Lion supported Mac.
- Run the Lion installer and make sure to choose your unsupported Mac's hard drive. Let the install finish.
- Boot back into the supported Mac's OS, and put the unsupported Mac back to target disk mode.
- Delete the PlatformSupport.plist at /System/Library/CoreServices on the unsupported Mac's hard drive.
- Reboot the Unsupported Mac and it should boot into Lion normally.
[crarko adds: I don't have the equipment to try this, but it seems plausible. As recommended in the hint, have a complete system backup handy in case something goes awry.]
