I loaded Snow Leopard on Friday. Yesterday, I discovered that Capture NX2 will not open any files at all. I get a generic message "This file can not be opened." I went to the Nikon web site and found a warning of "incompatibilities" between Capture NX2 and Snow Leopard. Nikon stated that Mac owners should wait a month before upgrading the OS. Unfortunately, the warning was too late for me. I was running NX2 V2.2.2. On a hunch, I downloaded the V.2.2.0 loader. I uninstalled 2.2.2 and loaded 2.2.0. I can now open files and the software appears to work (I didn't have time to try all functions). Absolutely every other software package that I have is working just fine. (Two or three were automatically modified by Rosetta.) If I have any issues with NX2, I'm going to go to Aperture, which was on my mind anyway.