<p>I just did some research. Apparently there was a brief period when H2 and H4 were not mountable via the USB cord when used on a Leopard computer. That’s been fixed with an update in the H2 software, available on their website. DH has always been a believer in taking out the card and using a card reader–which has never been a problem with Leopard, from what I hear. Whatever method used, there no longer seems to be a problem. Check out the Samson pages (samsontech dot com) for the H2.</p>