Once you've verified that you have the full installer, launch Terminal from the Applications:Utilities folder.Įxecute the following command in the Terminal window replacing 'Untitled' with the name of your USB key. If it's tiny (~20MB), you can either run it to install High Sierra and then redownload the installer or delete it, upgrade to the latest version of Sierra from the Mac App Store Update tab, then redownload the installer. Press Command+i on the keyboard and verify its size. Open your Applications folder and select the 'Install macOS High Sierra app.
It appears as though the full installer is only being provided to those on the latest version of Sierra 10.12.6 and users already on High Sierra 10.13. Unfortunately, users have reported that the App Store is providing them with a stub installer that downloads the files it needs during the installation process. You may notice that download is very quick. Once the installer launches, press the Command+Q keys on the keyboard to exit. If you are already on, or have already downloaded High Sierra, you may need to click the Download button. Navigate to the macOS High Sierra application page and click the Get button.
#Macos high sierra bootable usb how to
These are instructions on how to make a bootable macOS High Sierra USB key.Ĭonnect a 8GB or larger USB key to your computer then launch the Mac App Store from your dock.
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