When everything is running sweetly, macOS performance isn’t a problem. In most respects, though, 10.15 is no better prepared to cope with problems than 10.0 was almost 20 years ago.
RunningBoard
It’s not very often that we see the birth of a whole new subsystem both in macOS and iOS, but RunningBoard is brand new with 10.15 and 13.
How this new part of macOS tracks the apps which you open, and declares when they exit “Death Sentinel fired!”
RunningBoard is new to macOS 10.15 and iOS 13. It’s very active in the log, and can cause apps to crash sometimes. So what does it do?
How have checks of notarization changed what happens when you open a quarantined app in Catalina? What does XProtect do?
The Eclectic Light Company 