capewera.blogg.se - Create mac os usb boot image

Can I split an installation across multiple USB drives? Disk operations on the boot drive can be performed safely from a USB stick as well.

You can now run the operating system as normal and use this USB drive to boot up your Mac. If you’re using an Apple Silicon machine, you’ll need to insert the USB drive, shut the Mac down, then reboot and hold the Power key until you come to the Startup Manager.įor Intel Macs, restart and hold the Option key to enter into the boot selection dialog.įor both types of machines, use your keyboard’s arrow keys to select the USB drive from the list of bootable devices, click to confirm, and your USB drive will begin to boot. You could also use the Startup Manager to select your boot drive when you start macOS. Your Mac will reboot from the USB instead of your default startup disk. Note that you’ll need to input your administrator password and confirm that you want to erase the current drive. Once you press the Return key, the installation process will begin. For other Operating Systems, Apple provides the necessary snippets you need. Of course, you’ll need to change the file paths if neither of these are true. The downloaded installer will get stored in your Applications folder.

You’re installing macOS Big Sur onto your USB drive.

Note that you’ll want to change the placeholder for whatever your USB drive is called: sudo /Applications/Install\ macOS\ Big\ Sur.app/Contents/Resources/createinstallmedia -volume /Volumes/ Open Terminal (found in the Utilities folder) and copy the snippet below. Follow the instructions below for another way to create a bootable installer. It may open and begin to take you through the installation process when it finishes downloading, but you don’t want to do this.

Given the size of macOS Big Sur (around 13GB), it may take a while.