The "Mac" world is alien to me, but what you are talking about is a theoretical issue with all platforms. Ideally, you want "one" central file that the other devices have access to. Having "duplicates" that are dispersed (and updated?) remotely is like a Pandora's box...somebody is eventually gonna get "out of sync" or lose updates unless adequate precautions and procedures are implemented....KISS!!! (Keep It Simple Stup...Sir
) imo...