3 Replies Latest reply: Apr 5, 2013 3:13 PM by Niel
DraZzTehk Level 1 Level 1


iMac, Mac OS X (10.4.11), power PC processor
  • stedman1 Level 9 Level 9

    If you have a PowerPC iMac as shown in your signature, you can not upgrade to Mountain Lion. Depending on your Power PC processor, Leopard (10.5.8) will be as high as you can go.

  • sig Level 8 Level 8

    General Requirements

    • OS X v10.6.8 or later
    • 2GB of memory
    • 8GB of available space
    • Some features require an Apple ID; terms apply.
    • Some features require a compatible Internet service provider; fees may apply.


    • iMac (Mid 2007 or newer)
    • MacBook (Late 2008 Aluminum, or Early 2009 or newer)
    • MacBook Pro (Mid/Late 2007 or newer)
    • Xserve (Early 2009)
    • MacBook Air (Late 2008 or newer)
    • Mac mini (Early 2009 or newer)
    • Mac Pro (Early 2008 or newer)

    A 2006 iMac is not a Power PC. If you have a PPC it is 2005.

  • Niel Level 10 Level 10

    Choose About this Mac from the Apple menu and check the processor.


    If it's a G3, no further upgrades are available.

    If it's a G4 or G5, buy a retail Mac OS X 10.5 DVD from a source such as Amazon or eBay; Apple still might have copies in stock if you phone them.

    If it's an Intel Mac, buy a Mac OS X 10.6 DVD from the online Apple Store. Some Intel Macs can also run 10.7 or 10.8; regardless of what the OS limit for a given Intel Mac is, buying this is a prerequsite. To find out the limit, append the last three characters of its serial number to http://www.everymac.com/ultimate-mac-lookup/?search_keywords= and load the page.