Is it possible to airdrop between imac and macbook pro (desktop to laptop) macos 10.13

It is possible however you need to make sure that if one of the Macs are from 2012, you need to search for an older mac on the newer by clicking the button that says: "Don't see who you're looking for?" For more information follow the steps on this page and scroll down to the part which says "If you can't see the other device in AirDrop." Use AirDrop on your Mac - Apple Support

Yes, See Use AirDrop on your Mac - Apple Support

FWIW, it's macOS 10.13, not iOS 10.13.