COSINE  Web Snapper works for me... flawlessly.

Now... i'm curious... isn't there a free trial ? Why would you purchase something that didn't work on your mac ? I actually bought another program from them "Videobox" and that initially had an issue... so i emailed customer service... and got a super nice response back (in less the 3 hours no less!)... turns out... i had another plugin installed that was preventing Videobox from working properly... once that was removed... it worked like a charm.

As far as that netfix program you mentioned... i tried it... it doesn't do half of what Web Snapper does.  
(Version 2.3.2)