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#How to create a bootable installer for mac os high sierra install#
#How to create a bootable installer for mac os high sierra password#

At the chime or grey screen, hold ⌘ and S on your keyboard (two fingers) to enter single-user mode.

If you have only one computer then you will need to print this for reference. P lease read everything that follows before continuing.

It won’t work if you encrypted your startup volume with FileVault.

#How to create a bootable installer for mac os high sierra password#

If you configured an EFI Firmware Password that will preclude recovery, unless you know that password.It will not work in the following circumstances: There may be other techniques to recover from the “impossible” circumstance in which you find yourself, but the following is one that I have successfully used in the past. Of course that is not supposed to be possible, but if that really is the case you can use the following technique to create a new, temporary Administrator account, the sole purpose of which will be to log in as an Administrator that can give your normal account Admin privileges. Then: Read and follow the instructions below with care.Īs I understand it, you have a Mac with no Administrator accounts. The Sierra and El Capitan commands show the proper format of this argument. * If your Mac is using macOS Sierra or earlier, include the –applicationpath argument. You can now quit Terminal and eject the volume.

#How to create a bootable installer for mac os high sierra install#

When Terminal says that it’s done, the volume will have the same name as the installer you downloaded, such as Install macOS Mojave.

Terminal shows the progress as the bootable installer is created.

When prompted, type “Y” to confirm that you want to erase the volume, then press Return.

Terminal doesn’t show any characters as you type your password.

When prompted, type your administrator password and press Return again.

Sudo /Applications/Install\ OS\ X\ El\ Capitan.app/Contents/Resources/createinstallmedia –volume /Volumes/MyVolume –applicationpath /Applications/Install\ OS\ X\ El\ Capitan.app Sudo /Applications/Install\ macOS\ Sierra.app/Contents/Resources/createinstallmedia –volume /Volumes/MyVolume –applicationpath /Applications/Install\ macOS\ Sierra.app Sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia –volume /Volumes/MyVolume Sudo /Applications/Install\ macOS\ Mojave.app/Contents/Resources/createinstallmedia –volume /Volumes/MyVolume Sudo /Applications/Install\ macOS\ Catalina.app/Contents/Resources/createinstallmedia –volume /Volumes/MyVolume

Sudo /Applications/Install\ macOS\ Big\ Sur.app/Contents/Resources/createinstallmedia –volume /Volumes/MyVolume - /Applications/Install\ macOS\ Big\ Sur.app If it has a different name, replace MyVolume accordingly. These assume that the installer is still in your Applications folder, and MyVolume is the name of the USB flash drive or other volume you’re using. Type or paste one of the following commands in Terminal.Open Terminal, which is in the Utilities folder of your Applications folder.Make sure that it has at least 12GB of available storage and is formatted as Mac OS Extended. After downloading the installer, connect the USB flash drive or other volume you’re using for the bootable installer.Use the ‘createinstallmedia’ command in Terminal