Telling us that a Mac client is "not important", goes a long way to demonstrate how out of touch this company is with the demands of consumers in a large market segment.
I'm sorry, but where did we say that Mac was "not important" for us? We have always been saying including in this thread that we just follow our priorities and not always we can provide a release date.
P.S. No one is going to delete your message, unless it violates forum rules.
Yes, so far the File Transfer mode (as well as all other modes except Full Control) are only available in the desktop version. On mobile there is only Full Control mode, but we are planning to add more connection modes in the future.