I am using MacBook Air early 2015 + Sierra 10.12.6 and just purchased CSV-3203.
I connected 2 external monitors and both of them displays exactly same screen.
Do I need any setup or driver for this thing working?
Good day snova,
The CSV-3203 is making use of Multi Stream Transport (MST) feature to distribute 2 incoming video signals form teh source system to the Screens. I am quite sure MAC OS does not support MST so it will only send out 1 video Signal which is why the hub just shows that on both screens.
I would advise you to use a CSV-1460 on a MAC Book Air early 2015.
That has a Displaylink Chip iinside that will generate its own Video Signal outputs, so this way your dont have to depend on the MacBook air for that part. The CSV-1460 uses just 1 USB3.0 port and can output 2 x 4K 60Hz !