Restore a Mac computer to its factory settings by accessing the Mac Utilities screen. While connected to the Internet, select OS X Recovery or Internet Recovery. Click Reinstall Mac OS X, and follow screen prompts to finalize the restoration.
- Prepare the computer
Prepare for restoration by connecting the Mac to its AC adapter. Make sure the computer has access to the Internet via Wi-Fi or an Ethernet cable.
- Open the Utilities menu
To access the Mac OS X Utilities menu, simultaneously press and hold the Command and R buttons. Continuing pressing until the Apple logo appears on the screen. After releasing the keys, the Mac OS X Utilities menu is opened.
- Select the appropriate option
Review the Mac OS X Utilities menu. Depending on the operating system version, you may see OS X Recovery or Internet Recovery. Click on whichever option is available to you.
- Click Reinstall OS X
After selecting recovery type, click Reinstall OS X in the newly populated menu screen. Confirm this option by pressing OK in the pop-up dialogue box.
- Confirm Internet connection
You may be asked to confirm the Internet connection. Select the appropriate connection from the given options. Be prepared to enter your router username and password.
- Enter your Apple ID and password
Enter your Apple ID and password to confirm the reset. After inputting this information, press OK to begin the restoration process.
- Restart the computer
Restart the computer after the factory reset process has finalized.