yes,different unit can pair

yes, it's like a switch so it can transfer the data directly.

Hi the 3 ports doesn't mean each port gets a third of a Gb. what's the speed shows in the utility? the speed can be affected by many factors like distance and electric appliance 'cause it's transfer...

type CMD in search bar and open the command window （right click and run as admin） enter netsh winsock reset and press Enter this command is to reset your PC's network settings

it may take a period of time until they upgrade the driver for 10.12

what's the model number of your repeater?