Thank you for downloading Deadbolt!

Deadbolt lives in your Mac's menubar. Start by selecting a USB device to watch.

Then, whenever you remove that USB device, Deadbolt locks your Mac for you.

Prefer working from a keyboard? Set a global keyboard shortcut to lock your Mac.

You can also choose whether to simply lock your Mac, or start the screensaver. (But you should remember to set your screensaver to require a password to unlock!)