Airdrop Not Sending/Receiving

Make sure macOS is completely up to date on your Mac and make sure iOS is completely up to date on your iPhone or iPad. If you missed just a single update, then it may prevent Air Drop from working (terrible design, and even worse design for not providing any status or error messages, or logs).

I think I had to do something else the last time Air Drop failed to work, but at the moment I cannot recall what I may have done to fix it.

If you just purchased a used Mac, then did you perform a clean install of macOS on it so that you have a known good copy of macOS? A clean install of macOS is critical on a used computer so that nothing of the previous owner remains since the previous owner may have all types of software installed and unknown configuration settings. A clean install is when you erase the whole physical drive (Intel Macs only) before reinstalling macOS. Of course erasing a drive destroys all data on the drive which is not backed up.

Wise_User wrote:

I recently acquired a MacBook Pro 2015 to be part of my Apple ecosystem. Everything works great on it accept Airdrop. I am able to see my devices around me and my other devices can see my MacBook Pro but when trying to send or receive nothing happens. If I try and send a file from my Iphone it will try and send it and will sit there stating it is waiting but nothing appears on the Mac in the form of a Popup or no file appears in the downloads. I have turned off and on the WIFI and Bluetooth connections on all devices. I have also completed a hard reboot of each device. Firewall is turned off and Airdrop is set to everyone. I am at a loss of what is not working at this point.

I always found airdrop to be a bit finicky, sometimes it worked sometime it did not with no rhyme or reason.

Sounds like you did everything to encourage it...try another day and compare your results.

ref: Use AirDrop on your Mac - Apple Support