Following the guide of Insignia NS-PCY5BMA Bluetooth 4.0, Macintosh Yosemite 10.10.2, and Handoff, Handoff is still working well, even on Apple’s current 10.10.4. One issue that will creep up, is that every time the system is updated, the Bluetooth kext is replaced/updated. Luckily, only 2 things need to happen to restore functionality.