Hopefully, no one will try to steal your MacBook. But just in case it ever happens, you’ll want to be ready. Since MacBook Airs and Retina-equipped MacBooks don’t have lock-slots, Kensington has come up with a solution called the MicroSaver Ultrabook Laptop Keyed Lock ($50). You’ll have to blemish your laptop’s lid to use it, but for users in high-risk environments, that’s better than losing it altogether.

MicroSaver comes with what Kensington calls a K-slot adapter, a round attachment that fits on the top of your computer. This is then used to connect to the T-bar locking mechanism at the end up a six-foot long carbon-strengthened steel cable. While it’s not the absolute best solution we can think of, it works, and isn’t terribly unattractive. Also lind of cool: Kensington offers free online key registration, allowing you to get a replacement key if you ever lose yours.