After that, you’ll be able to rock the new freshly installed OS X. It can take a while, might want to play some Angry Birds for a while or grab a beer!Īfter the reinstall, you or the new owner will need to go through the setup process, transfer files, connect to WiFi…etc. You’re Mac will restart a few times automatically while everything is erased and reinstalled. Now you can kick back and wait while OS X reinstalls. Make a Time Machine backup of your files, apps, and settings on an external hard drive or save your data in. If you only have one drive, it will be selected for you automatically.īefore OS X installs, you’ll need to log in to your Apple Account. Reformatting your Mac requires careful planning. Now agree to the terms of service for the software license.Īfter that select the hard drive you want to install OS X on. When the Apple logo appears, you can release the keys. Click Continue at the bottom, and on the message that comes up, click the Continue button. Hold down the Command + R keys while your Mac is restarting. Next you’ll get the OS X Mountain Lion screen. Reinstall Apple OS X Mountain LionĪfter that’s done, go back to OS X Utilities and this time highlight Reinstall OS X and click Continue. This does a similar job of securely erasing your drive as DBAN for Windows. If you want to be extra secure, select Security Options, then select 7-Pass Erase, which meets the US Department of Defense 5220-22 M standard. That will erase all data and reformat the hard disk. While the startup disc is waking up, hold down the Command+R keys simultaneously. Locate the Mac drive in the list of disks. This tool allows you to manage the partitions on drives connected to your computer internal ones or external ones connected via USB. Press Windows Key + R to open the Run dialog, type diskmgmt.msc into the box, and press Enter to open it. Select the local drive and click the Erase tab, Format should be set to Mac OS Extended (journaled), the click the Erase button. Once your data is backed up and you've signed out of everything that might connect your old Mac to your personal information, you can erase everything on it by reformatting the hard drive. First, open the Windows Disk Management tool. Start your Mac and hold down the Command + R key combination. Note: I started by selling my iPad 3, and if you’re selling yours, check out my article on how to erase your data and reset it.
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