SMB on Mac OS has been a moving target, but it is getting better. It is more mature with Mac OS 10.10, 10.11 and beyond. NOTE: AFP is now deprecated as of 10.13. You should only use SMB. Some background information on SMB  SMB is Microsoft’s proprietary network file sharing protocol. Most versions of OS X prior to 10.7 relied on an open-source implementation of SMB called Samba for accessing Windows file shares and sharing files with Windows clients. When the licensing terms for