Looks like a graphics artifacts problem. High Sierra has a lot of bugs you should be aware of including incompatibility with certain graphics cards & chips. So far, Apple has released only one supplemental patch for the security vulnerability & InDesign cursor problem.
Which apps won't work on High Sierra
Adobe does not update Creative Suite apps any longer. Only Creative Cloud products are updated.
Thanks Nancy, I am assuming that you mean by"Adobe does not update Creative Suite apps any longer" that it does not update photoshop. so why did that sell me photoshop?
What does mean for all my photoshop creations?
Looks like I will have to look for a more reliable and consumer friendly creative program.