OS : Sierra System : Macbook Pro 17" Early 2011 Connection : Gigabit ethernet I have seen so may threads on this but no definitive answer or solution. When I connect to my synology NAS I get a download speed of 14MB/s using SMB (server is set to allow SMB3 with a minimum of SMB2 large MTU). However, when I use afp I get the full 60-90MB/s . Considering Apple say SMB is supposed to be the default now this is pretty strange. Does anyone know of a fix? Did Apple fix this in High Sierra?