macos Catalina will bring major changes to USB-to-Serial drivers. The drivers will no longer run in the kernel but in user space. That’s a good move in the mid-term as it will simplify driver development and stabilize the system (the driver can no longer crash the entire system). But I wonder when the new drivers will be available and if the CH340 drivers’ quality finally improves.
Fortunately, the old drivers can still be used in Catalina, at least for one more year…