Your data is very important, and very hard to recreate, if there are no backups available. And all hardware does eventually and inevitably fail. Errors and failures are rare, but they do sometimes happen. What you need for Mavericks, OS X 10.9 & Yosemite 10.10Įl Capitan System (10.11) requirements for upgrade If your Mac supports a more current release that 10.9 or 10.11, you’ll want to upgrade to that. You’ll probably need to upgrade a few of your current apps to newer versions, too. After downloading to your Applications folder, the installer opens automatically. In the App Store, click the Get button to begin downloading the macOS installer. Your existing files and data will be preserved. Click the link to open the App Store page for that macOS. You’ll get a package downloaded from the Mac App Store containing an installer, and you’ll then launch that-it’ll usually launch itself and wait for you to start the upgrade, when the download from the Mac App Store completes-and follow the instructions. If your Mac meets those requirements, you will want to get an external and complete backup or preferably two, then use the Mac App Store to acquire the OS X release you want to upgrade to. OS X El Capitan - Technical Specifications OS X Mavericks - Technical Specifications If your current operating system is OS X Lion (10.7), you can skip a few versions and upgrade directly to macOS High Sierra. Here are the technical requirements for OS X 10.9 Mavericks, and for 10.11 El Capitan:

How to update to mac os 10.11