A/V Receivers with Ethernet Connection Question

I have noticed that many of the higher end A/V receivers these days offer ethernet connections to a home network that allow for access to internet radio, updates, and music files and photos on a PC. Sounds kind of cool and I am considering this for a second system in our living room especially if I can gain access to all my music files on my computer.

My question is I own an Apple imac and use itunes with my CD library saved as Apple Lossless files. When I read the small print with these receivers (I've looked at Denon, Yamaha, Pioneer Elite) they state that you can only access PC's with a Windows media player and WAV, MP3 or ACC files. Does anybody know if there are any decent A/V receivers out there that would allow access to to my itunes library with Apple Lossless files on a mac? Or am I not fully understanding the capabilities of the receivers I mentioned above? I sent an e-mail to Denon asking the same question but have yet to hear a reply.

Thanks