Hi. I have a G5 dual 2.0 Ghz Power Mac running 10.5.8 hooked to my network. I put files in the public share folder on it, then connect via the TV Live device. It shows the files but when I select one to play it starts by showing the file name info just like it does on my Windows Box, but the video never starts playing. I've got a Windows 7 machine on the same network and I have no playback problems coming from that. I've tried it both wired at 100 Mb and wirelessly on a Wireless G connection. My Win7 machine has no problems with HD MKV's on its Wireless N adaptor.
Thanks for any help.