Hi again! It's the first time I encounter this error so I researched a bit ;w;
I found this guide step by step, it should work hopefully... it's the post of Jan-03-18 from GarnetX.
I hope it helps ;w; I'll keep searching meanwhile!
https://f95zone.to/threads/ways-to-run-rpgm-games-on-mac.6056/post-402335