With the latest version of OS X and Messages App, users can send audio messages to iPhones or Macs. This is really great feature to people who don’t like to writing. Even better, the recipient of the audio message doesn’t need to be on the latest version of OS X or iOS to be able to play and listen to the audio message.
Sending out an audio message or note from the OS X Messages app is incredibly simple, you’ll need to be on OS X 10.10 or newer to have this feature.
Audio Messages arrive to the recipient as a playable audio file embedded in the chat window. To play the audio message, they just tap on it.