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  2. Apr 2, 2024 · 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. 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. How to create a bootable installer for macOS.

  3. Sep 25, 2017 · How to install macOS High Sierra. Launch the App Store app, located in your Applications folder. Look for macOS High Sierra in the App Store. Here is a link. You...

    • Connect the USB flash drive to the Mac, if you need to format it go ahead and do so.
    • Download macOS High Sierra installer application from the App Store* and be sure the complete installer is located in the /Applications/ directory.
    • When the installer has completed downloading, it will automatically launch – quit out of the installer when this occurs.
    • Open the “Terminal” application found in /Applications/Utilities/ directory on the Mac.
  4. Jul 19, 2021 · For example, "Install macOS High Sierra.app" would become Install \ macOS\ High \ Sierra.app in this context. Here's another example that creates a macOS High Sierra install USB on a drive named "MacOS Installer": sudo /Applications/ Install \ macOS\ High \ Sierra.app/ Contents /Resources/createinstallmedia --volume /Volumes/MacOS\ Installer

  5. Step 1 How to Install macOS High Sierra. With the device powered off, disconnect any external hard drives and flash drives. Plug in your macOS High Sierra bootable flash drive. Hold down the [option] or [alt] (⌥) key on the keyboard and power on the device.

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