How to wipe a hard drive mac os x

Install the macOS that came with your Mac, or the closest version still available.

• Reinstall from macOS Recovery.
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Release the keys when you see the Apple logo, a spinning globe, or a prompt for a firmware password. When you see the Utilities window, you've started up from macOS Recovery. If you need to erase your disk before installing macOS, select Disk Utility from the Utilities window, then click Continue.

You probably don't need to erase, unless you're selling or giving away your Mac or have an issue that requires you to erase. Learn more about when and how to erase. If your Mac restarts to a setup assistant, but you're selling or giving it away, press Command-Q to quit the assistant without completing setup. Then click Shut Down.

How to Securely Erase Data from Your Mac and External Drives | The Mac Security Blog

When the new owner starts up the Mac, they can use their own information to complete setup. Decide whether to erase format your disk If you need to erase your disk before installing macOS, select Disk Utility from the Utilities window, then click Continue. Click Continue, then follow the onscreen instructions to choose your disk and begin installation. If the installer asks to unlock your disk, enter the password you use to log in to your Mac.

Please allow installation to complete without putting your Mac to sleep or closing its lid.

Securely erase a Mac hard drive

This is like cloning your hard drive and keeping it for some time. You can manually back up all your files and apps by copying everything to an external drive or iCloud. It allows to recover individual files and restore your whole hard drive in the event of a catastrophe.

However, before you use Time Machine, make sure to clean up your Mac. Plus, a backup will go faster and more smoothly if your Mac is not cluttered. For a quick cleanup, you can use a utility like CleanMyMac X. It will help you remove large and old files, useless apps, caches, and system junk in two clicks.

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Note that your first backup may take a long time, depending on how many files you have. Once your files are backed up, next be sure to disable any services that are associated with your system, including iTunes, iCloud, and iMessage, and deactivate programs on your Mac.

How to reinstall macOS from macOS Recovery

Did you know, you can authorize up to 5 computers, which means that you can play your content just on 5 different Macs? FileVault plays an important role on your Mac. It encrypts the data on your hard drive to prevent the unauthorized access to the information on your startup disk. Sign out of iCloud to make sure that any remnants of the cloud data, such as bookmarks, notes, reminders, etc.

Before you restore Mac to factory settings, be sure to sign out of iMessage. To ensure that all information is cleared from the Touch Bar, you need to erase its data.

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Follow these steps:. The following steps will tell you how to restore Mac to factory settings. This is pretty simple.