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How do I format a USB on a MacBook Air?
1 Format a USB Drive with a Mac
- Insert a USB drive into your USB port.
- macOS will recognize the drive and show its icon on the desktop.
- Launch Disk Utility.
- Select your USB drive from the list on the left.
- Select Erase at the top.
- Type in a Name for the drive, then select a Format.
How do I format my MacBook Air and reinstall from USB?
Booting Your Mac From a USB Drive Simply plug your created USB drive into an open USB port on your Mac. Power on the system, or restart it if it’s already on. Immediately press and hold the Option (Alt) key on your keyboard when it starts booting. You should now see an option to select your USB drive as a startup disk.
How do you format a USB drive on a Mac?
Use the following steps to use your Mac to format a USB drive to FAT32. Back up the USB device before proceeding with this process. Connect the USB device to your Mac or MacBook. Open Applications > Utilities > Disk Utility. Select the drive and click Erase. Name the device if you wish.
How do you install Mac OS from USB?
If the target Mac computer already had a macOS or OS X on it, then installing macOS from USB is straightforward and this is called the normal way. Step 1: Insert the macOS bootable USB drive on a USB port of Mac computer. Step 2: Shut down the Mac and wait for 1-2 minutes. This will make sure the Mac is powered off.
How do you install a bootable installer on a Mac?
When the macOS installer opens, follow the onscreen instructions. Plug the bootable installer into a Mac that is connected to the internet and compatible with the version of macOS you’re installing. Press and hold the Option (Alt) ⌥ key immediately after turning on or restarting your Mac.
What kind of USB drive do I need for my Mac?
Select “Mac OS Extended (Journaled),” or your preferred format type. The former option can help ensure that the USB drive is made fully compatible with your Mac, since most USB drives are preformatted for Windows computers by default. Type a name for the USB drive in the “Name” field.