graphics issues on

Hello, I am using macos high sierra 10.13.2 on MacPro Late 2013 3.5 GB 6-Core with AMD FirePro D500 3 GB.

I am using Dual displays of APPLE LED 24-inch Cinema Display.

It was no problem when I was using sierra, but the problem came out when I upgraded to high sierra.

(see the attached photos)

Rainbow scripts can be found.

It maybe come from the graphics problem on this machine, I guess.

Because, the same system is fine on my macbook 2015 or my college's Mac.