Use Apple Watch to Authenticate
Apple Watch users already know that you can use the wearable to unlock your Mac. But the Apple Watch is getting much tighter integration with macOS in Catalina — making various approval and authentication prompts a lot easier.
For one, you can now approve app installations right from your wrist. For those times when you need to type in your Mac’s password (such as when making system changes), you can quickly authenticate without any typing by just double-clicking the Apple Watch’s Side button.