Note: MacMAME now stores its data files in a user's home directory, in a folder named "MacMAME User Data" inside the user's Documents folder, not in the application's directory. For example, where previous versions of MacMAME stored the rom files in a folder named "ROMs" in the same folder as MacMAME, this version stores them in "/Users/yourusername/Documents/MacMAME User Data/ROMs". If you are upgrading from a previous version of MacMAME, you will need to move the directories containing rom files, screenshots, config files, marquees, and other data before this version of MacMAME will find them.