To install OS X 10.8 Mountain Lion, 10.9 Mavericks (free upgrade, but currently unavailable) or OS X 10.10 Yosemite (currently available free upgrade) you need one of these Macs. Dec 21, 2012 IMHO, upgrading older Intel Mac hardware (Core Solo/Duo- and Core 2 Duo-based Macs) to Snow Leopard shouldn't even be a question. Currently running the OS X 10.5.8 Model identifier imac 9.1 – Processor Intel Core 2 Duo – Speed 2.66 GHz – 1 Processor – 2 cores 0 Memory 4 GB. Hoping that we can go to Leopard Snow then to 10.8.2 or latest.
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.
After you install Snow Leopard you will have to download and install the Mac OS X 10.6.8 Update Combo v1.1 to update Snow Leopard to 10.6.8 and give you access to the App Store. Access to the App Store enables you to download Mountain Lion if your computer meets the requirements. Snow Leopard General Requirements. Mac computer with an Intel. Mac Os X 10 5 Leopard free download - Apple Mac OS X Mavericks, R for Mac OS X, Apple Safari, and many more programs.
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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