When selling, trading or recycling your device, it’s important to clear all data from the hard drive so that whoever gets hold of your former device can’t leak or steal any personal information. Typically those interested in erasing all traces of former files are getting ready to sell a computer, discarding damaged drives, upgrading or wanting a clean slate. Your hard drive may store financial documents, personal information and anything else that once called your computer home. Therefore, if you’re trying to learn how to wipe a hard drive, you must understand that you will need to erase all data of those once-existing files. In reality, these files are simply redistributed throughout the hard drive. To do so, hold both the Command and Q keys and then choose “Shut Down.” After this, you should be good to go.You may think that when you delete your files and move them into the trash, they’re gone forever. Turn off your laptop once the OS system is done installing.However, if you have an older Mac, you will need to reinstall the OS X system with the original CD that the computer came with. The window will show several options, but select the “Reinstall macOS” one. This should be an option after you erase your hard drive and exit Disk Utility. Here, select “Mac OS X Extended (Journaled)” > Erase. When you see your hard drive, select it, and then go to the “Erase” tab. You’ll be taken to MacOS Utilities, where you should select Disk Utility.
As it boots up, hold the Command key and R key. Finally, delete everything off your Mac and then reinstall the OS X system.Go to Preferences > Accounts and then click the “Sign out” option. Sign out of iMessage so that you don’t miss any texts.To sign out, go to System Preferences > iCloud > Sign Out. Sign out of your iTunes account by going to iTunes > Account > Authorizations > Deauthorise This Computer.
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