Nexxtech Bluetooth 4.0 USB Micro-Adapter
Works with Mac OS 10.9 (Mavericks) out-of-box
Wasn't sure if this would work with my Mac Pro (3,1; 2008) but bought it to see. Looks like it's compatible right out of the box. Just needed to plug it in then restart computer!
Also, VERY happy that the LED isn't super bright so it's low-key as well.
December 8, 2013