8 Replies Latest reply: Apr 21, 2013 11:05 AM by Gebe
Gebe Level 1 Level 1 (15 points)

Hi, I have an iMac (mid 2007). When I tried to install Mountain lion I had a message like<it's impossible to install Mountain lion on this hard drive>.

It's not the original HD, I replace the original by a bigger one (more gb and more buffer) Hitachi. I was able to install Mountain lion on a clone (external HD) but not on m'y internalisation HD. Do you know why?


iMac, Mac OS X (10.7.4), Mid 2007, Core duo 2, 4 Gb ram