2 Replies Latest reply: Dec 23, 2012 8:01 AM by The hatter Branched to a new discussion.
stevewells1975 Level 1 Level 1

I'm trying to upgrade to Mountain Lion from Lion and the App Store won't let me because of the error message "Mountain Lion is not compatible with this computer".  Why is this happening?  Can I get around it?  OR am I doomed to buy a new computer.  This computer is around 5 years old and I would really love to not have to buy a new one.



Mac Pro, Mac OS X (10.7.5)
  • Niel Level 10 Level 10

    You need to buy a newer computer.



  • The hatter Level 9 Level 9

    The first editions of the Mac Pro (1,1 thru 2,1) were born in 2005 with existsing 32-bit firmware and ML is becoming 64-bit only.


    Not that Vista and PCs don't use 32-bit firmware and still have 64-bit kernel. If you ever tried Windows 64-bit you know the trouble we have with that on these models as well.


    However, even Windows when it sees EFI and 64-bit OS expects to see Unified EFI aka EFI64 / UEFI 2.x rather than the older EFI 1.x that we have.


    You can order Lion 10.7 and use that. Or you can go into the hackintosh route and treat the Mac as a PC almost and dual-boot loader to get there. But you would have to look elsewhere for support and help on other forums.