Hi, I'm also having karma on an imac issues. I have followed the directions above but when it reaches the point of downloading after entering the IP address and password I get the following error message.

Failed to download the music database from the device. Communication with the device failed or was rejected. Can't get a database lock. This most commonly happens if you are already connected to your player with another program like Rio Music Manager.

I'm not connected to any other player or anything. Can anyone help?!

Many thanks, Benn.