Hi, I have my Mac Pro ethernet port 1 connected to my D-Link wireles router. I then have ethernet port 2 going out to a netgear 4 port switch. The switch is connected to a HTPC & Xbox 360 directly & through ethernet cable to another switch downstairs to another HTPC & Xbox 360. I am sharing internet and that works perfect, plex through Roku works perfectly downstairs too, but I am having a problem connecting my Mac Pro to the HTPCs so as to share files although both HTPCs can connect to the internet. I have done all the settings for sharing and network that I have read up and still a no go. Any suggestions? Ideally, I wanted to map my shared drive with my HTPCs.