Apple has added support for sending and receiving Live Photos in Messages with the OS X El Capitan 10.11.4 beta, which was released this week.
If you receive a Live Photo in Messages on your Mac, you’ll see an icon in the top right hand corner to indicate it’s not a still image.
Opening the image in Quick Look will allow you to play it like a video with a play button appearing n the bottom left corner. If you open it in Photos for Mac, it will appear like a GIF, the same as on the latest iPhones.
Prior to this, if you sent or received a Live Photo on your Mac, it was turned into a still and lost its audio.
If you’re keen to try out the new feature on your desktop, you’ll need to install the latest OS X beta — but be warned that it may not be as stable as an official release. OS X 10.11.4 will be rolling out officially later this year.