This is a bug in the OHRRPGCE engine when a Mac package is exported from a Windows computer. Here is a workaround you can try. Open the Terminal app, and use the cd command to switch to the folder where the "franken" app is located. Then run this command: "chmod +x franken.app/Contents/MacOS/ohrrpgce-game" I hope that helps! (And I hope I can fix the bug in a future version of the OHRRPGCE!)