How Do I update from 10.4.11? To the next

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

If it's a PowerPC G4, buy a retail Mac OS X 10.5 DVD from a source such as Amazon or eBay; Apple still might have copies in stock if you phone them.

If it's an Intel Mac, buy a Mac OS X 10.6 DVD from the online Apple Store.

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After I buy and install Leopard in my Power G4 IMac, can I install Snow Leopard from the disk I purchased through the Apple Store for my Mac Book Air? What about the OSX Lion, or Mt Lion versions I bought and downloaded from the Apple Store for my IMAC Snow Leopard last year. I know there is a limit on what systems I can install but can't find which it is as of yet. Thanks since this is exactly the issue I too am dealing with today. the Snow Leopard disk I installed on my MacBookAir is the one that is, or was $20, that was mentioned above. 🙂

A G4 or G5 can't be upgraded past Leopard 10.5.8.

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