I am working on an IMAC Intel Core duo processor G5. I have downloaded the program MAME OSX in an effort to try and run some arcade games, a feature that I was always jealous of Windows users. Here's the problem when I try and open the game (Street Fighter III) it tells me that some of the files were missing and that I should look in the log window. I look there and it tells me this: cap-33s-2.chd NOT FOUND ERROR: required files are missing, the game cannot be run. I have looked for help in other places and it tells me I need to put the .zip files of the rom in the roms directory. So I put them in library>application support>Mame OSX>ROMS. These are the files I have put in this roms folder: sfiii.zip, cap-33s-2.chd.zip So the right files are there yet it still says it cannot find the cap-33s-2.chd file. I have tryed putting both the files in one zip and was told the same error. I also tried putting them in the roms folder as unzipped files and I still get the error. What am I doing wrong? Here are some pictures to help explain this more clearly: I am trying to open the game highlighted: This is a screenshot showing what files are where and what error is appearing when I open the game: Thanks for all the help.