Hey guys, new user here, both to the forum and Macs in general. My problem is, coreaudiod on my MB Air 13.3 2010 no longer starts/runs. I've tried resetting the PRAM and following the usual steps for the seemingly common "missing system sounds"-fix (that's how I discovered coreaudiod no longer running, I had no system sounds). If I start /usr/sbin/coreaudiod manually from a shell it works, I have system sounds, and all applications I use (so far CS5, VLC, FaceTime, Skype) seem to have no issues with sound at all. Starting it like this doesn't fork it into the background, though, and as soon as I Ctrl+C it, it obviously stops. I've compared com.apple.audio.coreaudiod.plist as well as any other seemingly related plists (/L/P/A/c.a.audio.DeviceSettings, /L/P/c.a.audio.DeviceSettings, /L/P/c.a.audio/SystemSettings, etc. basically all files referenced by "strings /usr/sbin/coreaudiod") with another equally new and pristine MB Air 11.6 2010, and there are no differences or discrepancies that could account for this problem. I'm not running any 3rd party audio programs/tools/utilities, USB audio devices etc. This problem surfaced out of the blue, over a week since my last software install or update of any kind. Is there anyone who can help/point me in the right direction? What vexes me is that I can start /usr/sbin/coreaudiod manually and it seems to work fine while it's running. The MB Air 13.3 is a BTO 2.13 with 4 GB of RAM. Mr E.