Hi all, Mac newbie here. I have 2 x Acer 22" screens with just a VGA port which I'm trying to connect to my MacBook Pro Retina 13" 2015. I have one that is connected via an adapter to mini display port and I've tried connecting the second one via a VGA to HDMI adapter to the HDMI port but the Mac just flickers continuously and mostly stays black screen, on the laptop and the monitors. I thought about getting a via to HDMI lead but I don't think that will work. Can I connect the other one via another adapter to the second thunderbolt 2 port? I don't want to mirror the displays but want them to work independently. Thanks in anticipation!