One of my favourite new features of Mavericks is the ability to direct all audio output from your computer to Airplay enabled speakers. Meaning at last that I can “throw” Spotify onto my airplay speakers without having to use my iDevice.
So you want to do this – well one way is to go into preferences, open sound, choose output and select in there. That’s a bit long winded, why not just use this shortcut…
Hold down the option (alt) key while clicking on the speaker icon in the menu bar and it will bring up a list of all devices that you can send your audio output to.
Select the ones you want and hey presto.