airdrop not working on mac

Writing an effective Apple Support Communities question

Is this a New Issue or Old Issue ? 

New Issue - what has changed on the computer ?

Old Issue - what actions has the user taken to fix this issue ?

Reliable , accurate, details / context will really help to pinpoint a possible solution.

After all, we do not what to offer that which has already been attempted by the User 

So, what has the User ( you )done to try to fix this issue ?