WHAT FORMAT FOR USB DRIVE ON MAC INSTALL
In theory, there’s no reason why you couldn’t boot an older version of macOS, and Apple does offer ways to install older versions on a USB. Can I boot older versions of macOS from a USB drive? Our testing gave us no issues when using a USB 2.0 to USB-C connector, so you’re able to press your older USB drives into service. Am I able to use a USB connection other than USB-C? We recommend 16GB to give yourself enough “wiggle room” when it comes to the installation process. As such, you’ll need a large enough USB drive to store Big Sur. In our experience, you will not be able to do this. 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. which can be carried in a pocket or on a key chain, for example. 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. A USB flash drive is a data storage device that includes flash memory with an integrated USB.
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.
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