I would like to know if it is possible to get the battery level of a connected Bluetooth device (for example, a headset) on Mac OSX.
I'm looking for a command line or a library that would offer this possibility.
Thanks.
There is no easy way to get this information without special application.
There is an app especially designed for this only purpose - called AKKU.
It worked with Bose and Sony's headphones (checked)
https://github.com/jariz/Akku/
Remember to download version 0.1.0-beta.10.
The app works after restart.