How to Reset your Mac to Factory Settings
Updated: Sep 8
Mac computers are usually reliable. But like any computer, sometimes everything goes wrong. However, Try a factory reset that cleans your computer and reinstalls a clean version of macOS.
Factory Reset is the best way to prepare your old computer for a new owner to ensure that no leftover information is in the wrong hands. Whatever the reason, how to clean everything and start with a factory reset.
Restart your Mac
First, restart your computer. The easiest way is to hold the power button until the dialog box appears, then choose the restart option. Otherwise, you can select and restart the Apple icon in the top left corner of the screen.
If your computer is frozen and you cannot rely on macOS to complete the task, you can also use keyboard shortcut control + command + ejection (or power button).
Open in recovery mode
Once the computer is closed, hold command + R until the Apple logo is visible. Leave the keys and let the mac go up. This may take some time to load, so be patient.
Instead of opening your desktop, your Mac will boot into recovery mode. You must select the correct user profile and enter the password before getting full control. In the macOS utility window, you now have the option to restore the time machine backup, install a new copy of macOS, access help documentation, repair damaged disks, or erase all information.
If you want to erase everything and start with scratch, select disk utility.
Erase your data
Select your startup disk under the internal title, then click Erase at the top of the disk utility window. The dialog box will pop up. Change format in Mac OS expanded (journaled), then click Erase. After the process is complete, go to the Disk Utility menu in the top left corner and select Disk Utility.
Make sure that once this process is complete, you will not be able to retrieve any deleted data left on the drive. If you feel you still need your hard drive, we recommend you support it to the external hard drive first or sync important files in iCloud.
Your next step should be to restore macOS to the computer. Go back to macOS Utilities screen, reinstall macOS and follow instructions to restore the clean version of the operating system. If you are planning to sell the computer, you can skip this step and let the new owner install macOS.
Restore from Backup
If you choose to save your files through time machine backup, you can now restore those files through the macOS utility screen. Click Restore from Time Machine Backup, then select The appropriate backup from the list to restore your stored files.