Thanks for letting me know! I definitely should've tested on another Mac before release, but I was in such a rush -n-
I'm contemplating whether or not I should even leave the Mac version up until it's fixed, but in the meantime I've updated the project page with a note linking here.
EDIT: Also, regarding the bundle identifier, it looks like that's commented out in a fresh copy of DOSBox Staging to begin with. Not sure why :s