HT1557: About firmware updates for Intel-based Macs
Learn about About firmware updates for Intel-based Macs
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Helpful answers
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Feb 25, 2014 5:42 PM in response to positiveptby Niel,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, follow the Core Duo instructions, and if desired, open the Mac App Store, and try downloading 10.9. If you get told it's incompatible, go to the online Apple Store and order a download code for Lion 10.7.
A Core Duo Mac can't be upgraded past 10.6.8.
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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