Satechi has been working towards the ultimate keyboard experience for Mac users for nearly a decade. The newly-released BT Wireless Smart Keyboard ($55) is its latest attempt at a compelling multi-platform keyboard device. Designed to sync with 5 devices at a time, it’s an ultra-efficient keyboard for users with productivity in mind. Using the keyboard’s function key in addition to the 1-5 number keys, users can seamlessly switch between…