Advertisement Most Windows users reinstall their operating system at some point, but this isn’t as common a step for Mac users. While there are less invasive ways to, reinstalling macOS can still prove useful at times. Whether you’re having a major problem and want to start fresh, or plan to sell your Mac and need to reset it, reinstalling macOS is a relatively painless process. We’ll walk you through it. Note: I performed this process using a mid-2012 MacBook Pro running OS X 10.7 Lion and ended with macOS High Sierra. Amazon fire remote control app. The process may look slightly different on your machine. Before You Start: Back Up! Presumably, you’ve used this computer for some time and have personal data on it. Reinstalling macOS will wipe everything on your system, so it’s vital that you back up first. Before you back up, you might want to Your Mac only has a limited amount of available disk space – even more so if you're using a laptop. It's time to fight back and free up some serious space. By getting rid of old files you never use. The easiest way to back up is using Apple’s built-in solution, Time Machine. We’ve covered Time Machine is your Mac's built-in utility for backing up your computer. We'll show you how to set up Time Machine, make backups, and more.; you’ll need an external hard drive to take advantage of it. If you don’t want to use Time Machine or don’t have an external hard drive, you can look at There are lots of Mac backup options out there, and many of them have features that Apple's default backup app just can't compete with. Some of these offer cloud backup, so you won’t need any extra storage handy. However, cloud backups almost always require a paid subscription. If you only have a small amount of files, you might look at syncing your most important files to Google Drive or other cloud storage. Another alternative is copying your vital folders to a USB flash drive. MacOS X Lion (and other MacOS versions up to MacOS X El Capitan) come with few preinstalled applications like “Chess”, but you cannot remove/uninstall them the conventional way A waste of diskspace when you don’t really need the application (especially when you’re running low on space on. Boot Camp Assistant guides you through installing Windows on your Mac. Open this app from the Utilities folder inside the Applications folder. Then follow the onscreen instructions to repartition your startup disk and download related software drivers for Windows. Whatever you choose to do, remember that this process will erase everything on your Mac. Sign Out of Apps Before you proceed, you should also take the time to log out apps on your computer. Services like Adobe Creative Cloud limit the amount of installations you can use, so you should sign out to avoid wasting one on a non-existent system. Sign out of iTunes by opening it and choosing Account > Sign Out. You can sign out of iMessage by opening Messages and choosing Messages > Preferences. Choose your account on the left sidebar and choose Sign Out. Finally, sign out of iCloud by visiting System Preferences > iCloud and choosing Sign Out. ![]() Step 1: Boot Into Recovery Mode In the old days, you could reinstall the OS through the DVD that shipped with your Mac. But since new Macs don’t have an optical drive, we’ll use the built-in Recovery Mode to do so. This will work on any Mac running OS X 10.7 Lion or later. Shut down your Mac. Hold the Cmd + R keys (one of many ) and turn the power back on. Continue holding these keys until you see the Apple logo. After a moment, you’ll see a macOS Utilities (or OS X Utilities) page with several options. If this doesn’t work (perhaps your computer freezes at the Apple logo as mine did), you’ll need to start the internet Recovery mode instead. This runs the recovery environment from the internet instead of a partition on your hard drive. Hold Cmd + Option + R at startup to access this. You’ll see a spinning globe instead of the Apple logo. Connect to a Wi-Fi network if you’re not already. Then wait a bit while your computer downloads the recovery environment.
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