I just updated my Macbook to the latest version of Mac OS: Catalina 10.15.4.
However, I noticed that in the system preferences, there is a red dot on the software update icon, but after clicking it, it says it is already up to date...
So I want to know why it is here and how can I get rid of the red dot?
Fortunately, after upgrading to 10.15.5, the red dot disappears...