This feature already exists in OS X (since 10.7, I believe?): https://support.apple.com/guide/mac-help/view-and-restore-past-versions-of-documents-mh40710/mac h

This feature already exists in OS X (since 10.7, I believe?): https://support.apple.com/guide/mac-help/view-and-restore-past-versions-of-documents-mh40710/mac https://support.apple.com/guide/mac-help/view-and-restore-pa... I don't know how many third-parties implemented it though.