Summary: Updated: I read another review that told how to upload to a Mac. Okay, it does work. But what a pain this has been. It's actually not that hard to upload to your mac, but neither the computer nor the camera has any natural idea how to do it. The manual is worthless on this point.
Summary: Amazon should not have put these three cameras, the M400, M40, and M41 on the same page. The selection buttons imply that the main difference is in the memory capacity and configuration. I purchased the M400, only to discover when I received it that it has no optical viewfinder.