Today i've wrapped up my installation of a BCM94360CD in my iMac mid 2010 27". It was a bit of work and required several modifications to the system, but now i've got handoff working (and the Mac looks and feels 'stock' ) Shoppinglist iMac Tools (Torx T6, T8 and T10, suction cup for the screen and some other tools) BCM94360CD module An Mini-PCI-E adapter (there are models available with the USB-connections ready to go, get one of those instead of the one i got!) WLAN extension-cable (or any WLAN coax with plug) How-To Remove the original BTboard, datacable and BT antenna. The cable for the antenna is too short to go to the airport-position, so i've soldered in a new coax. Be carefull not to get it too hot! The isolation between the core and mantle will melt and your antenna won't work! Also remove the airportcard and the carrier-board (i need to modify it to connect USB for the bluetooth in the new broadcom module, if you get a better adapterboard, this is not necessary!). Use this schematic to locate the D+, D- and GND lines on your USB cable. Colors may vary! Strip the datacable and finish it with some heatshrink tube. Connect the D+, D- and GND according to this table Check the connections under a microscope: Reconnect the antennae, route the cables and you are done! Note: my antennae are connected wrong in this image! After this, it is simply a matter of reassembling the iMac, booting, enabling Handoff in the settings and you are good to go! If Handoff is enabled but it doesn't seem to work, try logging out of iCloud and logging in again. Worked for me!