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Since there will be iOS 6 / Xcode 4.5 Beta or Preview and Mountain Lion Beta or Preview, I wonder if using an iMac with 1TB of hard drive, can it be partitioned using its Disk Utility into 4 or 5 partitions, and install Lion on each of those partitions except one partition for Mountain Lion Beta?

Or alternatively, if it is a Mac Mini with 500GB and it is partitioned into 3 partitions?

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up vote 1 down vote accepted

You can definitely have any number of OS X installs on any number of partitions. Use the Startup Disk preference pane or hold down Option at boot to choose which partition to boot.

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if I buy a new iMac with Lion, the Lion won't have an installation DVD? So I have to actually buy Lion again in the App Store for $29.99 to install on the other partitions, I think? – 太極者無極而生 Jun 16 '12 at 13:01
Macs that come with Lion have an install partition on the hard drive instead of a DVD. Apple has instructions on their support site to copy the partition to a flash drive so you have it if the hard drive goes down. – CajunLuke Jun 16 '12 at 14:09

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