For earlier versions of Mac OS X, including Mac OS X Mavericks 10.9, Mac OS X Mountain Lion 10.8, Mac OS X Lion 10.7, Mac OS X Snow Leopard 10.6, Mac OS X Leopard 10.5, Mac OS X Tiger 10.4, and before, the process to obtain those installers differs a bit. Downloading Mac OS X. There are a few reasons why you might want to download and install old versions of Mac OS X or macOS. Perhaps you are relying on software you have discovered doesn't work properly in the newest.

• Run Old Mac Software On Os X

Choose About this Mac from the Apple menu and check the processor as well as the OS version.

If it's a Core Duo Mac running 10.5.8 or earlier, clickhere, install the DVD, and run Software Update. A Core Duo Mac can't be upgraded past 10.6.8.

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.

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Run Old Mac Software On Os X

Aug 9, 2015 11:00 PM