I vividly remember when a friend of mine who runs a small graphic design studio was sent an archive file macOS couldn't open natively and asked me for help. Never having used a Mac and without any clue as to which tools the stupid app shop (which was rather new at the time) held, I couldn't for the life.of me get the blasted thing to obey me, until I found a terminal. I then installed build utils and compiled the frickin' unpacker I needed myself since it only had Linux binaries. Worked like a charm.