How can I protect my Mac?

Episode 1357 (2:20:17)

John from Los Angeles, CA
Apple MacBook Pro

John wants to know if keeping his Mac on while he's walking around will damage the laptop. Leo says not if he puts it to sleep. It stops reading the drive that way.

What is a hardware password? A hardware or firmware password will keep the computer from starting up in any way other than its designated startup. On the Mac, he'd go into Utilities and set his firmware password. It's very important not to forget it, though.