I would say both. Even if I did download a mission or an incomplete mission to work on, I wouldn't know where to put them on the M1 Mac to get Arma 3 to read them. This issue already exists with mods except it can be bypassed with custom launch options through Steam for now. The Steam version of Arma 3 has 2 launchers: A standard Arma 3 game launcher and an experimental Apple Silicon M1 Mac Arma 3 game launcher. I have tried to figure this out using both launchers, but I still haven't figured this out yet. I've also tried the latter you mentioned and it does open up the scenarios folder, but my question is where is this folder on the Mac and how can I navigate to it if I wanted to edit or import an incomplete mission (that I didn't work on using the M1 Mac) for use in the editor?