I'm maintaining a very old Obj-c app using the very useful FSCopyObjectAsync and FSMoveObjectAsync APIs to make async copy with progress info (including the throughput) Now I must drop compatibility with 10.9 and I would to replace these APIs (consider they are no longer available with Swift), but Apple deprecated them without a replacement, any hints? I found the C API copyfile, it doesn't return the throughput and the fixed read buffer size (65k) is ridicolous because copy is very slow compared to FSCopyObjectAsync. I would avoid to fork copyfile... Do you know some other more Apple-like API similar to FSCopyObjectAsync?

We have a valid DUNS number for our organization, now a subsidiary developed an app and they want to publish it using their apple developer account (unrelated to ours) but they can't because we own the main DUNS. We must share the DUNS with them? Is it enough? Is it the correct behaviour? The subsidiary must have access to our account to publish the app? (We don't want)