Computers, Laptops & Tablets Apple 159 159 people found this article helpful How to Reset MacBook Air It's easy to restore your MacBook Air to its factory settings by Simon Chandler Writer Simon Chandler is a former Lifewire writer who covered cryptocurrency, social media, AI and other topics. His work has appeared in Wired, TechCrunch, and The Verge. our editorial process Twitter LinkedIn Simon Chandler Updated on November 14, 2019 Apple Macs iPad Tweet Share Email There are a number of reasons why you might want or need to reset your MacBook Air, even if this isn't something you'd normally do when your model is working properly. The most popular reason someone resets a MacBook Air is that they are selling it. In this case, resetting your MacBook is essential, since you wouldn't want to hand over a repository of your personal data. In other words, you need to wipe your personal information and settings off the machine, so that you can sell it without putting your security and privacy at risk. This is perhaps the most common reason for why you'd want to reset your MacBook Air, but another major one relates to solving performance issues. If your MacBook Air has been lagging and working slowly, AND you've tried every available option for tuning it up and improving its performance, then it may be time to try resetting it to its factory settings. This is a last-ditch strategy, but in many cases, it works well. Once completed, the MacBook Air would be in a similar state as when it was first removed from the box. This article is for readers with a MacBook Air, but we also have an article on how to reset a MacBook Pro. How to Reset MacBook Air: Create a Backup First things first, you'll want to create a backup of your MacBook Air before resetting it, especially if you plan to reuse it again or to use your files and docs with a new Mac. Perhaps the most common way of backing up involves the use of Time Machine, a pre-installed Apple app that saves your files (e.g. music, photos, apps) to an external drive. Here's how to create a backup using Time Machine: First of all, connect an external storage device Click the Apple icon in the top-left corner of the screen (on the left of the top menu bar) Click System Preferences Click Time Machine Click Select Backup Disk Select your external drive, then click Encrypt backups and then Use Disk Finally, click the ON button (on the left-hand column of the Time Machine window), if it isn't already in the 'ON' position After you've clicked Use Disk (or ON), Time Machine will soon begin a backup of your MacBook Air. Later, after your MacBook Air has been reset to its factory settings, you can restore this backup by re-connecting your external hard disk to the Mac and then following the onscreen instructions. Time Machine is generally recommended for most MacBook Air users, but it doesn't do everything a backup app could possibly. For example, even though it copies your files and apps, it doesn't create what's called a 'bootable clone' of your MacBook Air, which is something you'd need if you want to have your MacBook (or another MacBook Air) running exactly as it did before. As such, you might want to consider downloading a free third-party backup app, such as SuperDuper or Carbon Copy Cleaner. While a rundown of each and an explanation of how they work is beyond the scope of this article, a previous Lifewire guide runs through the best third-party backup apps available. How to Reset MacBook Air: Sign Out of Your 'iServices' There's one small but important thing you should do if you're resetting your MacBook Air for the purposes of selling or giving it away. This involves signing out of the various Apple services you're signed into on your Macbook, such as iTunes, iCloud and iMessage. How to sign out of iCloud Click the Apple icon in the top-left corner of the MacBook Air's screen (it's in the top menu bar)Click System Preferences…Click iCloudClick Sign Out How to sign out of iTunes Open iTunesScroll up to the menu bar at the top of the MacBook Air's screen and click AccountFrom the dropdown menu that appears, click AuthorizationsClick De-authorize This Computer…Enter your Apple ID and PasswordClick De-authorize How to sign out of iMessage Press Command + Space Bar simultaneouslyType Messages and press EnterClick Messages (in the menu bar at the top of the Mac's screen)Click Preferences…Click the iMessage tabClick the Sign Out button, which will be on the right-hand side of your Apple ID That completes all the necessary steps you need to take if you're planning on selling your MacBook Air or giving to a friend or family member. Next comes the actual step of resetting it, as described below. How to Reset MacBook Air: Performing a Factory Reset In order to reset your MacBook Air to its factory settings, you'll first need to boot up your Mac in Recovery Mode. To do this, press and hold Command + R when restarting your MacBook Air or switching it on, keeping both keys held until you see the Apple logo. After the Apple logo has appeared and it's finished starting up, you'll be shown the Utilities window. It's here that you can erase your hard disk and perform the reset. Here's how you do it: Click Disk Utility Click Continue Click View > Show All Devices Select your hard drive (e.g. "APPLE SSD") and click Erase In the Format field, choose the APFS option if you're running macOS High Sierra or later. If you're running macOS Sierra or earlier, choose the Mac OS Extended (Journaled) option Click Erase There is no Undo feature for erasing the SSD in your MacBook Air. Take care and make sure you've backed up all your data before clicking Erase. Thus begins the fateful process of wiping your MacBook Air's hard drive clean. It can take several minutes to complete, so you may want to prepare a pot of coffee or do some calisthenics. Once it has finished you can then reinstall macOS, as described below: From the Utilities menu, click Reinstall macOS Press Continue Finally, follow the onscreen instructions to complete the installation One last thing to note: if you're selling or giving away your MacBook Air, you'll want to stop after the installation has been completed, and NOT proceed with the setup of your 'new' Mac once you reach the Welcome screen. To stop after the installation has been completed and leave the MacBook Air in its factory condition, you should press Command + Q, and then click Shut Down. If you do that, the next time the MacBook Air is turned on, it will start the setup process just like it did when it was brand new.