Airdrop not working between Mac and iPhone 6s

I have a MAC with OS X Yosemite Version 10.10.5 and an iPhone 6S Version 11.1.2 and my air drop stopped working. Seems to have happened when I updated my iPhone software.

I can air drop between iPhones. I have Wifi enabled on both as well as Bluetooth.

Both are discoverable by everyone.

Any ideas? I have pictures that I want to transfer to my Mac.

Thanks!