![]() OS X El Capitan 10.11 can upgrade Yosemite, Mavericks, Mountain Lion, Lion, or Snow Leopard.Īnd no, you cannot run the Catalina version of Mail or Safari on High Sierra. ![]() macOS Sierra 10.12 can upgrade El Capitan, Yosemite, Mavericks, Mountain Lion, or Lion.Open that app from your Applications folder to begin installing the operating system. These Mac models are compatible with macOS Sierra: Our latest fully-supported operating system if macOS Mojave (10.14). Sierra was replaced by High Sierra 10.13, Mojave 10.14, and the newest Catalina 10.15. In keeping with Apple’s release cycle, macOS 10.12 Sierra will no longer be receiving security updates. 18 Why can’t I install macOS Sierra on my Mac?.17 How do I install Sierra on an old Mac?.14 Can I upgrade directly from High Sierra to Catalina?.7 How do I update my Mac when it says no updates available?.
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