I'm using a Mac Book Pro 2012 with Yosemite to radio stations from radio.de transfer. The connection works fast and flawlessly without having to hire a lot.
Audio is transmitted via composite cable and the sound is great as well.
Even my Nexus5 can send audio though that would be possible even without Bluetooth with the Yamaha AV Remote app.
Machnmal I interruptions but I do not as yet on what that can be traced back ... am still looking ...
All in all a great device but at a price which you should already think about whether DLNA would not be enough to send audio data to the receiver. I would not buy it again.