My Mac was turning dark and light modes automatically, but it doesn’t anymore. Night shift works, but it stays dark or light unless I cycle the options in System Prefs. I changed nothing since I bought this Mac. Why could this be happening?
Hey there!
Maybe it could be by the update to catalina
Check the solution in this link
https://m-mx.gearbest.com/blog/how-to/macos-catalina-automatic-darklight-mode-not-working-try-these-solutions-8767