You can just rename the macos binary to .app and it'll work. But generally you want an actual .app bundle, I made a tool for that in the past (in rust too!) slm

You can just rename the macos binary to .app and it'll work. But generally you want an actual .app bundle, I made a tool for that in the past (in rust too!) slmjkdbtl/packapp you can check it out, i think the official apple docs are referenced in the source as well