some editor windows always blinking when playing

        In my Mac Unity Editor(2018.4.2f1), once hitting play button to run my app, some windows have always been blinked, turnning to black screen and then recovering to normal quicky,  again and again. These windows include profiler window,  so I‘m completely unable to catch what the Profiler window show. I google this problem, but found no answers.
        Had someone met this problem.  I wish someone can help me.