Hello
There are two problems with opening Spine files on MacOS:
1.spine does not open a file if you drag it from the Finder to the program itself (any version of macOS).
- The problem is only on the bigSur OS version. When you try to open a file by double-clicking on it, when Spine is not running, Spine starts, but the file that was trying to open does not open (either the previous project opens, or opens an empty one). For some users, when spine is running, double-clicking on a file in Finder will open the desired project, for some users it also does not open.