Skip navigation

If I have an iMac G3, G4, or G5, can I upgrade to 10.6 or 10.7?

862 Views 1 Reply Latest reply: Nov 29, 2011 4:46 AM by a brody RSS
a brody Level 9 Level 9 (62,045 points)
Currently Being Moderated
Nov 29, 2011 4:37 AM

If I have an iMac G3, G4, or G5, can I upgrade to 10.6 or 10.7

 

No. 

10.5.8 is the newest operating system available for G5s, and iMac G4s with a minimum of 1 Ghz (800 Mhz is less).

For other Mac models that minimum is 867 Mhz on a single processor, and dual 800 Mhz does not count.  Third party software known as LeopardAssist can allow older Macs to use 10.5.8.  Note, upgrading to 10.5 removes Classic compatibility.  Adding an external Firewire drive, or partitioning the hard drive with 10.4.11 or earlier continues to allow Classic support.   This is covered in more detail here:

https://discussions.apple.com/docs/DOC-1757

 

 

10.4.11 is the newest operating system for those with a Firewire port on their iMacs.  XPostfacto is a third party software that allows older Macs to use 10.4.11.
10.3.9 is the newest operating system for those without a Firewire port on their iMacs.
   

10.6, also known as Snow Leopard is only available to those with an Intel processor.    The G3 is an IBM processor, the G4 a Motorola processor, and the G5 is an IBM processor.    And 10.7, also known as Lion is only available to those with an Intel Core2Duo, Core i3, i5, or i7 processor.  For more about the 10.6 limitations see:

 

https://discussions.apple.com/docs/DOC-2455

 

and the 10.7 limitations, see:

 

https://discussions.apple.com/docs/DOC-2465

10.7.1 iMac 5,1 MacBook Pro 3,1, Mac OS X (10.7.1), - * Links to my pages may give me compensation.

Actions

More Like This

  • Retrieving data ...

Bookmarked By (0)

This site contains user submitted content, comments and opinions and is for informational purposes only. Apple disclaims any and all liability for the acts, omissions and conduct of any third parties in connection with or related to your use of the site. All postings and use of the content on this site are subject to the Apple Support Communities Terms of Use.