It used to be available here then it got removed. I don’t know why.
Please leave a comment if you know why. Alternatively please share this with your friends if you want. Reading this, I don’t why this would be useful to anyone, only that it once did exist.
They have since released a different app which streams music and some videos from your Mac to your iPhone or iPad. You can then re-direct this to your Apple TV if you have one to listen to the music or video on your big TV! You can find this app here.