Q: Why is AirDrop transfer failing?

Same here. Even after force quit the finder on both Macs I'm only able to copy files from one machine to the other but not vice versa. Have this issue since LIon came out.

Airdrop worked when I installed it at the Apple store.  Now that I need to transfer documents and/or files, NOTHING is happening even though the airdrop icon for each computer (from MBP to MPair) appears on the appropriate screen.

What am I missing?  What task did I forget to perform?

same here, apple gives no response at all

i had airdrop issues...

when sending to another machine from my own, the other machine instantly denied the request

when the other machine tried sending to me, it failed with a warning "apple id certificate is invalid"

//----

after calling apple:

go to the apple>preferences>iCloud

log out

log in

do this on BOTH machines

fixed

Hey thanks your method worked!!! I was so worried when I couldn't get it to work even after relaunching finder.

My MacMini AirDrop stop sending files but can able to recieve file from macbook pro.

I tried many things including relaunching finder on both side but NO LUCK.

After shutting down both macbook pro and mac mini and starting again solves everything.

Now i can send/recieve files from/to macbook pro/mac mini.

After 2 hours trouble shooting just to send 1 pdf file, and restarted my iMac a good deal of time... It still fails to transfer, or decline the transfer.

Honestly, the user shouldn't need to restart their devices, iMacs every single time just to transfer files via Airdrop...

and I can see the issue haven't been solved since 2011!!!

Thanks - this worked for me.