Hi guys, looks like this issue is caused by Gatekeeper (Apple security software), in particular the App Translocation, which was introduced in Sierra (see for instance https://eclecticlight.co/2016/06/16/macos-sierra-will-break-many-installers-and-updaters/). Basically, this means that the Gatekeeper will copy the app to another folder with a random name before starting it. This of course breaks the relative path to the ROMs folder. Fortunately, this is easily fixable. 1. Quit Catakig 2. Execute...