Been looking at this for a few devices myself. I can connect to my smb shares via windows, linux, and iOS, but not my mac.
The link below explains the issue:
https://discourse.osmc.tv/t/samba-access-to-raspberry-impossible-from-mac-osx-since-last-update/15779Pretty much, if I've read the news correctly, there was something fixed with smb shares regarding security during the most recent Patch Tuesday with Microsoft. Like usual, Apple hasn't updated their stuff yet. I don't think you'll be able to use OS X devices to access patched samba shares until Apple decides to update the security.