If you never encountered this strange error in your Mac's Terminal app, then you're lucky. I, sadly, had made friends with this error gibberish sometime last month. I admit that I only use Terminal to make it talk and say swear words (example here). Yesterday, I figured that if there's no way to find the answer, Google would find one. Boy, did it ever. One of the more reliable links on the Google search was to a post on the Apple forums. Skimming for anything that looked like a solution, someone posted a link saying "more help here". Clicking on it, it went to a site that explains what's causing it. And just what was causing the error? Two Google Talk plugins in the QuickTime folder.
(via: http://timesinker.blogspot.com/2009/05/weird-magiccam-error-message-from.html)
It is coming from the Google Talk's virtual video devices (but it's probably not actually causing any trouble directly - see below) - which are installed here:
/Library/QuickTime/Google Camera Adapter 0.component
And the MacCam related functions are in these two files:
/Library/QuickTime/Google Camera Adapter 0.component/Contents/MacOS/Google Camera Adapter 0
Run strings on it (strings "/Library/QuickTime/Google Camera Adapter 0.component/Contents/MacOS/Google Camera Adapter 0" | grep -i magiccam) and you get:
/Volumes/BuildData/PulseData/data/recipes/320452156/base/branches/googletalkplugin_release_branch/googleclient/talk/magicflute/magiccam/magiccammac.cc
Anyway it's not actually harmful and generally if you've a problem this is unlikely to be the cause of it. You can just [re]move the files as necessary to get rid the messages though your problem may well be somewhere else but at least you can eliminate it as a possible cause.
