Hi there first off I'd like to introduce myself. I just bought my first Mac two days ago and so I love it. It is a Intel Imac Duo Core (2 ghz)....I am trying to setup my Firewire Motu 828 mk II with it but I am running into some problems...The first time I did it I could not reboot my computer after and had to reinstall os 10.4. Now I have got it running but I cannot seem to adjust any volumes from the Motu Mixer Console. I have a simple configuration of Firewire 'out' of the Imac into the first Firewire port and then Main outs from the 828 to my monitors...When i go to the Motu Console I adjusting any volumes does nothing...I have also changed sound output on the Imac preferences to the Motu outputs. The only thing I can think of is do I need to disable the onboard sound? Could it be conflicting? The driver i used for the Motu is MOTU_Universal_Audio.dmg. Sorry for the long post Im just a bit frustrated and do not know what to do so Id appreciate any help from someone with a Imac and Motu 828 setup. Thanks very much ..im glad I found a good Mac forum hehe =)