How much space is needed to install Mac OS X 10.7 on to an external drive?

How much space is needed to install Mac OS X 10.7 and OS X 10.9 on to an external drive? Plan to partition drive for 2 systems.

iMac, macOS Sierra (10.12.6), iMac (27-inch, Mid 2011

Posted on May 31, 2018 9:57 AM

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17 replies

pmgraph Author

Level 1

4 points

Jun 1, 2018 5:16 PM in response to Bradley Dichter

Apple actually walked me through the steps. I actually "recovered" my OS straight from Apple since I didn't have any disks with the system software. You do have to have some kind of record that you actually purchased the software or it was on the Mac you originally bought. Since my Mac is the same the software was referenced to the serial number of the computer. So, it wasn't a fresh install but a recovery.

pmgraph Author

Level 1

4 points

Jun 2, 2018 8:40 AM in response to babowa

You are right about that. I have had several drives fail on me. It is all a matter of time for all of them. I don't know how to make a bootable clone. So, I will deal with that next week.

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How much space is needed to install Mac OS X 10.7 on to an external drive?