Only Mac OS 10 and later, based on BSD, uses ‘/‘. (And, I guess, A/UX.) Classic MacOS used a ‘:’, but it wasn’t regularly exposed in the UI. The only way most users would know is that the colon couldn’t be used in a file name.
I might be wrong, but I think you still can’t use a ‘:’ in a filename in macOS. If I recall correctly it will let you do it and show it in Finder, but actually replace it with a ‘-’.
Only Mac OS 10 and later, based on BSD, uses ‘/‘. (And, I guess, A/UX.) Classic MacOS used a ‘:’, but it wasn’t regularly exposed in the UI. The only way most users would know is that the colon couldn’t be used in a file name.
I might be wrong, but I think you still can’t use a ‘:’ in a filename in macOS. If I recall correctly it will let you do it and show it in Finder, but actually replace it with a ‘-’.