Q: Air Drop iPad IV

Hi

I can see my iPad from my Mac. But I cannot see my Mac from my iPad.

Software is iOS 8.2

I have Air Drop on. It is un-restricted.

I have tried resetting the network as was suggested on another discussion of this issue.

I can see Air Drop.

I have it opted to EVERYONE

So, I go to PHOTOS. Then I use the usual Square icon with the upward arrow.

Airdrop is showing there but cannot see my MAC.

Does anyone know what I might be doing wrong please?