Q: Airdrop between my devices

Follow the instructions here to share between iOS devices, or here to share between iOS and macOS.

In particular, note:

AirDrop system requirements:

To send items to an iPhone, iPad, or iPod touch, or to receive items from those devices, you need a 2012 or later Mac model with OS X Yosemite or later, excluding the Mac Pro (Mid 2012).

 

To send items to another Mac, you need:

 

• MacBook Pro (Late 2008) or later, excluding the MacBook Pro (17-inch, Late 2008)
• MacBook Air (Late 2010) or later
• MacBook (Late 2008) or later, excluding the white MacBook (Late 2008)
• iMac (Early 2009) or later Mac Mini (Mid 2010) or later
• Mac Pro (Early 2009 with AirPort Extreme card, or Mid 2010)

Did you follow all the troubleshooting tips for Macs?

Of note it mentions:

• If you're sending to a Mac:
  • If the receiving Mac is using OS X Mavericks, Mountain Lion, or Lion, it needs to have an AirDrop window open: choose Go > AirDrop from the menu bar in the Finder.
  • If the receiving Mac is a 2012 or older model, click “Don't see who you're looking for?” in the AirDrop window or sharing sheet of the sending Mac. Then click “Search for an Older Mac.”
  • Find out if the Mac has “Block all incoming connections” turned on in Security & Privacy preferences. A Mac won't receive items using AirDrop if this setting is turned on.
• If AirDrop on the receiving device is set up to receive items from contacts only, make sure that both devices are signed in to iCloud. Also make sure that the email address or phone number associated with your Apple ID is in the Contacts app of the receiving device.