https://apple.stackexchange.com/questions/407177/windowserver-high-cpu-using-external-monitor-big-sur/408444#408444 https://apple.stackexchange.com/questions/40

https://apple.stackexchange.com/questions/407177/windowserver-high-cpu-using-external-monitor-big-sur/408444#408444 https://apple.stackexchange.com/questions/407177/windowserve... started happening in Big Sur to me.