there is an app called "Bluetooth Explorer" that is made by apple for developers. it is part of the "Hardware IO Tools for Xcode" located at https://developer.apple.com/downloads - however, there is a chance you might need to have some kind of apple developer account or access to see it. there is a checkmark button in one of the settings for audio that says "force aptx" - i did this for my audio device, and it now always works.
overall, apple has been seriously dropping the ball on bluetooth. with 10.10.2, i there were white noise sound blasts, as well as occasional interference with the apple bluetooth keyboard. so, i tried the 10.10.3 beta which fixed the white noise, but made the keyboard conflict happen constantly. with the last update to the beta, that's even worse and now i get audio crackling at the same time. extremely disappointed. hope they nail it for the final release, but looks grim.