![]() The Mac must also be using macOS High Sierra or later, the latest version of macOS Sierra or the latest version of OS X El Capitan. To download an installer suitable for creating a bootable installer, use the App Store or use a web browser to download from a compatible Mac. Follow the onscreen installation instructions.Ī bootable installer can be useful if you want to install macOS on multiple computers without downloading the installer each time, or when you can't install using the other methods. Open your Applications folder and double-click the macOS installer, named Install. ![]() pkg file, then follow the onscreen instructions to install the macOS installer into your Applications folder. Product functionality and feature availability may vary on older systems. dmg file to open it and see the package (.pkg) file within.ĭouble-click the. Note: As new major versions of macOS are made generally available, Microsoft will remove support for the oldest major version and support the newest and previous two major versions of macOS. Shift-Option-Command-R: When you press and hold. ![]() Option-Command-R: When you press and hold these three keys at startup, macOS Recovery might offer the latest macOS that is compatible with your Mac. dmg file of macOS High Sierra, but when I want to install it, then it tells me 'This copy of the Install macOS High Sierra application is damaged, and can‘t be used to install macOS.'. Command-R: When you press and hold these two keys at startup, macOS Recovery will offer the current version of the most recently installed macOS. Use these links to download a macOS disk image (.dmg) file.ĭouble-click the. Hello, I have an iMac A1311 and installed macOS Sierra on it and I want to upgrade it to the macOS High Sierra as offline.
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