Rogue Amoeba’s AirFoil has long been one of the Mac apps we can’t live without. The app allows Mac users to pump audio on an app-by-app basis to any AirPlay speaker within range.
Now, AirFoil 5 is here. And it’s a huge update. Not only does it introduce functionality that allows AirFoil to send audio to Bluetooth speakers and headphones (not just AirPlay devices, like the Apple TV), it can also send audio to multiple speaker groups at once..