How can I format my MacBook Pro hard drive?

Episode 1463 (2:15:34)

Zack from Los Angeles, CA
MacBook Pro

Zack is trying to reformat an old MacBook Pro and he gets a "temporarily unavailable" error. Leo says that Apple has a theft prevention setting that would prevent him from deleting everything in case the laptop is stolen. But there's a way around it by restarting it with Command + R. At this stage, Leo recommends going to the Apple Store and have a Genius look at it.