High Sierra: Safari black box glitch
Just found out that when I'm connect to my external display (via thunder bolt / mini display port to HDMI) with Macbook Pro, Safari starts to show black boxes on some area where there are some rasters images. I also seen this problem with Numbers app. Here is an sample screen shots:
Safari shows black boxes while chrome doesn't.
Please help/guide me to solve this problem.
MacBook Pro, macOS High Sierra (10.13), 13-inch, Early 2011, 16GB Memory