I have the Oppo and when I connect the iMac all works well for about 2 minutes and then the Oppo stops "seeing" the iMac. Pity, because it sounds well until this happens. I did a firmware update that was supposed to fix it and the fix lasted about 2 days. I was offered to send it back but I just started using the iMac with the Digital Ins on my Denon CD/SACD player and I left it at that.