stuffit

I am trying to download Star Wars: Battlefront on my iBook G4 running Tiger. I learned you need to download Stuffit Expander, but this doesn't work. When I download the file, it says "Disk Failed to Mount" or "not recognized." Is there a way to fix it or am i doing something wrong?

Hello - I recently went to expand some old .sit StuffIt archives from the mid-90s through the early 2000s. I downloaded the latest version of StuffIt Expander, which claims to be able to expand any .sit archive. However, with all of my archives, I get a message: "Expansion failed...