BioUnlock will let you unlock your Mac using your iPhone 5s Touch ID Sensor. The tweak works by using WiFi to communicate with your Mac from your iPhone. Bluetooth support is on the list of things to do, as well as Windows support.
Demo of my upcoming Cydia tweak, BioUnlock, which will allow you to unlock your Mac using the iPhone 5S TouchID sensor.
Support for Windows users is planned, but not for the first release.
The developer plans to 'charge a dollar or two' for the tweak, and you can expect it to be ready for purchase by the end of January.