If you do nothing, your computer will go to the next device in the boot sequence list, which will likely be your hard drive.
Start by plugging the thumb drive into a USB port. Otherwise the computer will load from the hard drive as normal. If you’re booting from USB media, you must change the BIOS boot order so the USB device is listed first.
How to restart a mac to boot from a usb software#
The boot order tells the machine which devices to search for the software needed to launch the computer and the priority each device in that search. That’s because the BIOS settings include the boot sequence the machine follows when starting up.
How to restart a mac to boot from a usb Pc#
Starting your PC using USB rescue media is not difficult, although it first requires an adjustment in the BIOS (Basic Input Output System). The Startup Manager only lists drives that include bootable content. NOTE: Have multiple USB devices connected to your Mac? Don’t worry. The machine will start to boot from the USB drive.