Good signal strength, decent router (Asus RT-N10E). Moving files with Rsync… just flies. When I connect an Android phone, speeds are a bit better around 1Mb
I suspect it may be some configuration issue with any of the laptops, I keep an eye on the Mac, I just don’t know what to configure. One thing I noticed is that in Debian I set up the port of the machine to 22000, but Synthing in macOS reports the address of the Debian at another port, 192.168.1.217:35656.