8266157: Problem list several awt jtreg tests that fail on macOS 11

Reviewed-by: dcubed, pbansal
diff --git a/test/jdk/ProblemList.txt b/test/jdk/ProblemList.txt
index e6cb6d2..68c0cc5 100644
--- a/test/jdk/ProblemList.txt
+++ b/test/jdk/ProblemList.txt
@@ -522,6 +522,11 @@
 java/awt/GridLayout/ChangeGridSize/ChangeGridSize.java   8238720 windows-all
 java/awt/event/MouseEvent/FrameMouseEventAbsoluteCoordsTest/FrameMouseEventAbsoluteCoordsTest.java
 
+# Several tests which fail sometimes on macos11
+java/awt/Window/MainKeyWindowTest/TestMainKeyWindow.java 8265985 macosx-all
+java/awt/security/WarningWindowDisposeTest/WarningWindowDisposeTest.java 8266059 macosx-all
+java/awt/Robot/Delay/InterruptOfDelay.java 8265986 macosx-all
+java/awt/MenuBar/TestNoScreenMenuBar.java 8265987 macosx-all
 
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