I recently installed the Avernum trilogy on my newer mac, and when attempting to play it I encountered this problem:
Clicking on "load game" doesn't do anything, neither does command-O. I tried to open a saved games file from the finder, but that didn't work either. It might be helpful to know that the A1 icon doesn't show next to the file name, just the standard application icon.
This certain computer is an Imac running on Mac OS 9.2.2