You can upgrade to OS Yosemite on any of the following Mac models. Your Mac also needs at least 2GB of memory and 8GB of available storage space.
Check compatibility
MacBook introduced in 2009 or later, plus MacBook (13-inch, Aluminum, Late 2008)
MacBook Air introduced in late 2008 or later MacBook Pro introduced in mid 2007 or later Mac mini introduced in early 2009 or later iMac introduced in mid 2007 or later Mac Pro introduced in early 2008 or later Xserve models introduced in early 2009
To find your Mac model, memory, storage space, and macOS version, choose About This Mac from the Apple menu . If your Mac isn't compatible with OS X Yosemite, the installer will let you know.
Make a backup![]()
Our Apple virus scan software is free. Download it now for your Mac with macOS 10.13 (Sierra) and later versions! For additional features get our Free Security Suite, including free Antivirus for Mac, free Phantom VPN to secure and anonymize your online surfing, Avira Browser Safety (on Firefox) to block ads and browser trackers. Jan 17, 2020 If anything happens to your Mac, you can boot directly from the backup clone and carry on working without having first to replace your hard drive and restore your data. As a best practice, you should keep both a file backup and a clone of your Mac. Does My Mac Come with Backup Software? Yes, it does. Time Machine is macOS’ built-in software. Aug 14, 2015 OS X Yosemite Security Updates 10.10.5 - Security Updates for OS X Yosemite. Download the latest versions of the best Mac apps at safe and trusted MacUpdate.
Before installing any upgrade, it’s a good idea to back up your Mac. Time Machine makes it simple, and other backup methods are also available. Learn how to back up your Mac.
Get connected
It takes time to download and install OS X, so make sure that you have a reliable Internet connection. If you're using a Mac notebook computer, plug it into AC power.
Download OS X YosemiteBest Security Software For Mac Yosemite Download
For the strongest security and latest features, find out whether you can upgrade to macOS Catalina, the latest version of macOS.
Best Security Software For Mac Yosemite National Park
If you still need OS X Yosemite, use this link: Download OS X Yosemite. A file named InstallMacOSX.dmg will download to your Mac.
Install the macOS installer
Double-click the downloaded file to open a window showing its contents. Then double-click the file within, named InstallMacOSX.pkg.
Follow the onscreen instructions, which will guide you through the steps necessary to install.
![]() Begin installation
After installation of the installer is complete, open the Applications folder on your Mac, then double-click the file named Install OS X Yosemite.
Click Continue and follow the onscreen instructions. You might find it easiest to begin installation in the evening so that it can complete overnight, if needed.
Allow installation to complete
Please allow installation to complete without putting your Mac to sleep or closing its lid. Your Mac might restart, show a progress bar, or show a blank screen several times as it installs both OS X and related updates to your Mac firmware.
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