Select Reinstall macOS from the list of macOS Utilities and follow the prompts to reinstall the newest version of macOS.With your newly-reset MacBook Air, start by quitting out of Disk Utility by selecting Disk Utility, then Quit.Your computer no longer has an installed operating system on it, meaning no matter whether you’re selling your laptop or simply reformatting the drive to improve the speed or performance of your computer, you’ll still have to reinstall your operating system. When this process is complete, your disk is successfully wiped-but you aren’t done yet. You’ll now see a display begin to erase your MacBook Air’s drive and data. Give your reformatted disk a name and click Erase to confirm your erasure.Select the Format pop-up window and choose Mac OS Extended.Click the Erase button inside Disk Utility.For most users, this is the main and only disk listed. Once Disk Utility has opened, Locate and select your MacBook Air’s Startup Disk on the left-hand side.To factory reset your device, however, click Disk Utility at the bottom of the list.If you want to reinstall macOS over your current file system, click Reinstall macOS.Don’t let go until you see the macOS Utilities window appear on your display. ![]() ![]()
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