This is a macOS10.13 issue, specific for some Intel GPU cards. Apple has fixed(partially) this issue inside macOS10.13.4 released build.
Following are the workaround for resolving this issue.
1) Update your mac machine to latest macOS10.13.4. Here, Apple has fixed this issue to some extent. You will face very less number of rendering issues.
2) Disable GPU preview and set display performance as typical.
Once you have updated to macOS10.13.4 .You might still face some rendering issues. Since, Apple has not fixed this issue completely.
Please switch off GPU rendering for these cases and report a separate post for tracking.Joe Sullivan supported this idea ·Joe Sullivan commented
I have this problem too, I have turned GPU performance off, which has fixed the grey artefacts and text rendering problems, however, the program has become very slow because of it. Don't expect this from Adobe or Apple considering the price of there products.
High Sierra - 10.13.2 (17C88)
MacBook Pro (13-inch, Late 2016, Four Thunderbolt 3 Ports)
2.9 GHz Intel Core i5
16 GB 2133 MHz LPDDR3
Intel Iris Graphics 550 1536 MB