I tried both, no luck. I do have Popcorn 3 running on my laptop which is also running 10.6.6 and it runs fine. I keep my movies on my Mac Mini so having it on my laptop is far from ideal. I emailed Roxio and the message back although responsive was not what I wanted to hear. They said they don't support legacy software and my only form of support are the forums. We're talking one version back. Perhaps it's time to look for a replacement to Popcorn?