Is it possible to connect one bluetooth keyboard to multiple computers (MacBook Pro, PC - both are bluetooth enabled) and switch between them like a KVM switch does?
I guess your actual problem is to control two computers using one set of keyboard/mouse?
Then have a look at synergy.
There are several devices for this purpose. Here are a few:
Up to three paired devices:
Up to four devices:
Up to eight devices:
There are some two-device keyboards, too.