Hello. Please review the fix for jdk/client. Bug: https://bugs.openjdk.java.net/browse/JDK-8226806 Fix: http://cr.openjdk.java.net/~serb/8226806/webrev.00
On macOS 10.14(and not on 10.13/10.15) some of the Robot operations produce the warnings in the error log which suggests that the used API should be called on Appkit thread only. Some related information can be found here: https://indiestack.com/2018/08/let-it-rip/ The root cause in the case of Robot is the generation of keyboard events. To fix that, I have moved these methods to the Appkit, even mouse events to prevent races between event generations. -- Best regards, Sergey.