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- Oct 29, 2011
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I see at the genius bar they have an external hard drive they can boot into one of three versions of Mac OS X. And I made my external firewire HD bootable with Mac OS X Lion So I may run iDefrag and other utilities on the Mac's at the company I work for. We also have a few mac's that have PPC so they need 10.5, and some with 10.6. I was wondering how may I run all three on my external (I have the discs to install them on my Mac. Do I just install each one on the external. Or do I partition the drive to 3 pieces and have it installed to each partition?