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Helpful answers
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Nov 24, 2014 11:02 AM in response to jhawkin1by Niel,You need either its original disks, or a 10.5 DVD if it’s a PowerPC Mac, or a 10.6 DVD for an Intel one. To check what CPU it has, choose About this Mac from the Apple menu.
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Nov 24, 2014 11:11 AM in response to Nielby jhawkin1,Where do I go about purchasing OS X 10.5? If it was made/purchased in 2006 wouldn't it be 10.4?
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Nov 24, 2014 11:12 AM in response to jhawkin1by Niel,1. Buy it from a source such as Amazon or eBay.
2. You don’t need to use the computer’s original OS.
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Nov 24, 2014 11:16 AM in response to Nielby jhawkin1,
Thanks. Will the OS X 10.5 be compatible with the current memory that is on my computer? Will it function as if it was originally installed with the OS X 10.4? -
Nov 24, 2014 11:18 AM in response to jhawkin1by Niel,1. Yes.
2. Yes, except that the computer won’t have iLife, and for a PowerPC Mac, Classic.
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Nov 24, 2014 7:21 PM in response to jhawkin1by Allan Jones,When you do "About this Mac" from your Apple menu (left end of menubar), what does that say about your processor? You computer is on the cusp between obsolete iMacs with PowerPC processors (1998 through 2005) and the modern iMacs with Intel processors (2006 to present).
If it is Intel, you can skip 10.5 entirely and go straight to OS 10.6 with a US$20 disk from Apple. As proper 10.5 retail install disks are often terribly expensive, that would save you a lot of money.