What can I use to open an old .rsrc file from one of my older programs?
this : https://sourceforge.net/p/rezilla/wiki/Home/
but I don’t know if it still works in recent macos systems.
anyway it’s opensource so you can update it !
Thank Jean, that did the trick. I had to dust off an old laptop to get it to run but was able to dig all the bits out that I needed. 