Some parts of my interface are black and very blurry
已回答
The operating system is macOS
Version is 2018.2.4
Yesterday was good, today I don't know why.
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Looks similar to https://youtrack.jetbrains.com/issue/IDEA-149433
What Editor theme do you have in Preferences | Editor | Color Scheme? Does IDE restart help?
Does it help to set Editor theme to Darcula's defaults and restart?
I finally found the reason, it was all caused by the plug-in of AceJump. Uninstalling or disabling it can work normally.