Hiya, I have EXACTLY the same probelm with my Sony DCR TRV 22, I have a G5 IMac 17 inch model. Its frustrating since this was the main purpose I got the computer for.
I even lugged my computer to Regent Street to the 'genius bar' last month to try and get it sorted, basically my camcorder works with every other Mac execpt G5's, might be the case with yours. I have an active case going with them but the tech support in Ireland could not care less and keep referring me to this outdated web page with some compatibility listings, they also cheekily told me to try my camcorder with Final Cut Pro!
http://www.apple.com/macosx/upgrade/camcorders.html
I got a lot of friendly advice and help on this site for the problem
http://www.simplydv.co.uk/simplyBB/v...db88bfe8f230fa
Try some of the possible solutions here.
I also started a forum on the apple.com/uk pages about this problem last week but apple tecchies have yet to respond, another user however told me he has the same combination of camcorder and G5 and it works OK for him. My Imovie just won't recognise the camera at all but has recognised another sony model in the past.
The only way Apple have been able to explain this aberrant incompatibility is using the compatibility page listed above but since cameras not listed on there are also compatible and the models listed are a bit on the old side it is pretty meaningless.
Apple will probably refer you to Samsung.
I hope you have more luck than I have had.
My Mac has been a lot of trouble, its not THAT user friendly. the help function is crap and it didn't even have a proper manual. Ipods do not a good computer company make......but it does look nice!
The fact the apple staff are so disinterested only makes matters worse. BTW, is your G5 noisy? Mine was constantly buzzing/humming, I reported it and they sent me a new power pack, when I replaced it the noise has gone, so don't ignore it if you have it.