how to upgrade 10.5.8 OS X

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

If it's a Core Duo Mac, click here, install the DVD, and run Software Update.

If it's a Core 2 Duo or better Mac, upgrade it as if it was a Core Duo Mac, and once done, if desired, open the Mac App Store and try downloading Yosemite. If you get told it's incompatible, go to the online Apple Store and order a download code for Lion 10.7.

Mac OS X 10.7 and newer don't support PowerPC software such as Microsoft Office 2004. If you upgrade the OS, back up the computer first.

(129353)

Hi,

I have a Core 2 Duo, I got a copy of Mac OS X Snow Leopard as suggested on the Apple site but my computer will not read the disk. The CD drive works (I used a normal music CD to test). The install disk just spins around for a few seconds and then gets ejected.

What should I do? Please help. Thanks!

SuperDrives have two lasers. One for CD and one for DVD (which the SL Disc is) Try another DVD in the drive.

Pete