https://bugs.openjdk.java.net/browse/JDK-8233643 should have resolved this
test failing on macOS .. but it was just seen again.

Here's a log file snippet for the jdk-18+21-1328-tier4 sighting:

#section:main
----------messages:(5/183)----------
command: main bug4515762
reason: User specified action: run main bug4515762
Mode: othervm
Additional options from @modules: --add-modules java.desktop
elapsed time (seconds): 36.267
----------configuration:(3/40)----------
Boot Layer
  add modules: java.desktop

----------System.out:(0/0)----------
----------System.err:(14/914)----------
java.lang.RuntimeException: Action has not been received: pressing VK_T
at bug4515762.checkAction(bug4515762.java:112)
at bug4515762.main(bug4515762.java:176)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:76)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:51)
at java.base/java.lang.reflect.Method.invoke(Method.java:569)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:127)
at java.base/java.lang.Thread.run(Thread.java:833)

JavaTest Message: Test threw exception: java.lang.RuntimeException: Action has not been received: pressing VK_T
JavaTest Message: shutting down test

STATUS:Failed.`main' threw exception: java.lang.RuntimeException: Action has not been received: pressing VK_T
----------rerun:(42/6540)*----------