Just plugged in two LG 5K Ultrafine displays on either side of my iMac Pro 8 core. Everything on each display is slightly blurry. When I unplug one of the displays, the other returns to razor sharp clarity as I expect.
Each monitor is plugged directly into the iMac – no daisy chaining.
How can I get both monitors to show clearly?
Best Answer
Most likely, you are plugging the displays into the same Thunderbolt controller (ports adjacent to each other). To ensure you're using the other controller, use the ports on the "opposite side" of the bus
According to Apple: