How do you pair a mouse to a hackintosh without a wired mouse?

I unpaired my magic mouse so I can re pair it and see if the mouse works correctly. No way to pair the mouse without a mouse, no popup in OS X like you usually get when there’s no mouse.

Looks like it isn’t going to go to sleep. Will need to turn the monitor or the hackintosh off. Finally went to sleep.

Maybe if I wake it up, it’ll show the no mouse thing. Maybe not. Nope, just went back to sleep. Only the monitor went to sleep.