zpaolo11x

Well fantastic! This solved the issue after upgrading to 1.9.1: quick menu -> options -> manage core options -> save content directory options. Now everything works like a charm. On a side note, upgrading RetroArch on macOS is a bit of a painful experience because, by default, RA saves the cores and other data in the app bundle folder, which gets wiped after the upgrade. I redefined all the links to point to my library/application support/retroarch folder instead.

I read it, I even tried that solution. I tried both using the "-c" option passing a custom .opt file to that, that overwrote my custom .opt file putting all .cfg file options in there for some reason, then I tried using per content directory override, which saves again a file with the entries from .cfg files, not the entries from the .opt file. If what you mean is that there's a way to change the default opt file for that core, and save it as a per content directory override, I still have to try it, but for sure it's not what was suggested in this thread.

I'm sorry but the issue is not solved still. I also came here full of expectations but the suggestions simply don't work for this simple reason: config override based on content folder works only for "config" files, that is the general retroarch options, not for "opt" files, that is the options files for a core. So for example if I use the same core for game gear and master system I can save different configs "per folder" to use different overlays or scaling or scanlines and even shader, but if the core is the same, they will share the same core options.