In this tutoriall you can enable Handoff and Airdrop on MacBook Air 2011 and Mac mini.
Good news for 2011 MacBook Air and 2011 Mac mini owners, here's a refreshed tutorial that enables Continuity on those machines as well. No hardware upgrade is required on these Macs. Handoff, Instant Hotspot, and iOS↔OSX Airdrop now fully work.
Just download the following Programm and run it:
https://github.com/dokterdok/Continui...