There are ways of getting your hands on, and installing, old versions of the Mac operating system. Here's how to get El Capitan, Yosemite, Mavericks, Mountain Lion, Lion and even Snow Leopard, and more. OS X Mountain Lion is available now as a download from the Mac App Store. Just click the Mac App Store icon in your dock, purchase Mountain Lion, and follow the onscreen instructions to install it. Though you can install Mountain Lion directly from your Mac's hard drive, a bootable installer drive can be more convenient for installing the OS onto multiple Macs. OS X Mountain Lion for Mac, free and safe download. OS X Mountain Lion latest version: Download Mountain Lion for Mac. OS X 10.8 Mountain Lion is Apple's latest operating system for Mac.
Choose About this Mac from the Apple menu and check the processor. If it's a PowerPC Mac, it's already running the newest OS it can. If it's a Core Duo Mac, click, 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, check the system requirements for Yosemite. If the computer meets them, you can then upgrade to Mountain Lion or straight to Yosemite as desired. 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.
Before embarking on a major OS upgrade, it would be wise, advisable and very prudent if you backup your current system to an external connected and Mac formatted Flash drive OR externally connected USB, Thunderbolt or FireWire 800, Mac formatted hard drive. Then, use either OS X Time Machine app to backup your entire system to the external drive OR purchase, install and use a data cloning app, like CarbonCopyCloner or SuperDuper, to make an exact and bootable copy (clone) of your entire Mac's internal hard drive. This step is really needed in case something goes wrong with the install of the new OS or you simply do not like the new OS, you have a very easy way/procedure to return your Mac to its former working state. Then, determine if your Mac meets ALL minimum system install requirements. Mac OS X v10.6 Snow Leopard system requirements Purchased Installer disc here. To install Snow Leopard for the first time, you must have a Mac with: An Intel processor An internal or external DVD drive, or DVD or CD Sharing At least 1 GB of RAM (additional RAM is recommended) A built-in display or a display connected to an Apple-supplied video card supported by your computer At least 5 GB of disk space available, or 7 GB of disk space if you install the developer tools OS X Lion system requirements Purchased emailed download code here. To use Lion, make sure your computer has the following: An Intel Core 2 Duo, Core i3, Core i5, Core i7, or Xeon processor Mac OS X v10. Onyx Mac Download Mavericks. 6.6 or later to install via the Mac App Store (v10.6.8 recommended) 7 GB of available disk space 2 GB of RAM To install OS X 10.8 Mountain Lion, 10.9 Mavericks (currently unavailable) or OS X 10.10 Yosemite.you need one of these Macs: OS X 10.8 Mountain Lion purchased emailed download code here.
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