![]() When asked to confirm your choice, click Remove. ![]() Everything on the disk has been wiped, it's a clean Mac. Now we have this OS reinstalled, it runs smooth as it were. Hover the mouse pointer over the device that you want to disconnect, and then click the remove (x) button next to its name. Choose the disk listed on the left side, and click 'Erase' Tab If you're going to reinstall Mac OS, just leave the settings as default, and click 'Erase' to continue After erased, click Reinstall OS X, for example, to continue. Disconnect any paired Bluetooth Devices (if necessary).Ĭlick the Apple menu icon (), select System Preferences, and then click Bluetooth.Select your iMessage account, and then click Sign Out. ![]() Quit out of the Disk Utility app, and this time choose Reinstall OS X and Continue. Select Erase and then confirm your choice. Open the Messages app, click Messages, choose Preferences, and then click Accounts. How do I wipe my Mac and reinstall Select your startup drive on the left (typically Macintosh HD), switch to the Erase tab and choose Mac OS Extended (Journaled) from the Format drop-down menu. When prompted, provide your Apple ID and password, and then click Deauthorize.Ĭlick the Apple menu icon (), select System Preferences, choose iCloud, and then click Sign Out. From the menu bar at the top of the screen or at the top of the iTunes window, choose Account, select System Preferences, then choose Authorizations, and finally click Deauthorize This Computer. Now that you have backed up your important files, you must disable all of the services associated with your Mac, especially if you plan to give away or sell it.
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