It can be really frustrating trying to hit the moving target that is Mac OS. I just found out that my first full project, a learning experience in the form of yet-more-minesweeper-idiocy, now more-or-less fails under Snow Leopard. I remain on PPC, so I have no real way of finding out exactly why it fails. It seems to run without actual errors, the sound effects work, but the images do not display (I have a friend with a new-ish iMac). I used a sub-classed NSMatrix of NSImageCells to draw the squares, but I am told the squares do not present images. The images are diced out of a single png file that is in Resources or an application support directory. Does anyone have some idea of what might have changed in NSImage, NSImageCell or NSMatrix in SL?. I am not really keen to dive back into it, but having it not working rankles me a bit.