UPDATE:As reported by our friend Michele, now the tool to activate AirDrop on unsupported Macs, also supports USBBluetooth LE 4.0 adapters if you do not have a compatible integrated Bluetooth card.
With the exit of OS X 10.10 Yosemite, Apple has taken more than questionable decisions, not to support all Mac with Bluetooth 4.oand therefore not allow the operation of some of the new features like AirDrop on the unsupported Macs introduced by Yosemite. In our recent guide we showed you how to enable these features on MacBook air and Mac mini from 2011, but the procedure to do was very complex and inexperienced users have not always managed to get the desired result.To help the greater number of people who found themselves with their Macs excluded from Apple, we offer you a Tool released by a developer that allows you to activate Handoff, Instant Hotspot is AirDrop on Macs not officially supported. All users with aMacwithBluetooth 4.0 can run this Tool directly, while those who do not own the Bluetooth 4.0 must replace the entire hardware card with one that is compatible (not a very simple operation).
Below is one list of Macs compatible with the Tool, with a note if the Bluetooth card change is requested.
Guide to using Handoff, Instant Hotspot and AirDrop on unsupported Macs
Use the very simple tool. * Download the tool Continuity Activationfrom following link. * Extract the file you just downloaded. * Open the newly extracted folder and double click on the file Continuity Activation Tool.
At this point, you will only need to follow the simple instructions that appear on the screen. Ignore or decline any window Access to accessibility features. At the end of the installation you should find yourself with the item to enable Handoff in System Preferences -> General. As a last step, after activating the relevant Handoff entry, to disconnect the Mac and all the iOS devices from the iCloud account and then log in again.