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Click this button and you will be prompted to authenticate using your Apple ID and password. You should see a button which says “ Free”. If you do not see this update, search “ OS X Yosemite” in the search bar of the App Store. In the Updates tab, you should be able to see a banner that mentions OS X Yosemite. The operating system version number will be displayed in the About This Mac window. To check which operating system your Mac is running, click on the Apple logo in the top-left hand corner of your desktop and select “ About This Mac”. If your Mac is running OS X Snow Leopard (10.6) with the latest updates (which include the App Store) or newer (10.7, 10.8, 10.9), you can head over to the App Store and click " Updates" in the top-right hand corner of the menu bar. Step 2: Check Your Current Operating System Version
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Click here to learn how to back up your Mac with Time Machine. Backing up a Mac is very easy with Time Machine. Step 1: Backup Your Macīacking up your Mac is always a good idea, but is especially important before you do system updates. If you decide to upgrade, here is how you can do it. If you haven’t already upgraded, you may want to look into the new features of Yosemite before you make your decision considering that Yosemite can slow down older Macs. Apple's latest operating system, OS X 10.10 Yosemite, features a design overhaul and new features that allows iOS and OS X devices to communicate with each other in new and exciting ways. Upgrading your operating system on your computer has also been simplified. Over time, technology has become simpler to use in general.