macOS Catalina gives you more of everything you love about Mac. Experience three all-new media apps: Apple Music, Apple TV, and Apple Podcasts. Locate a missing Mac with the new Find My app. And now coming to Mac, your favorite iPad apps. You can even extend your desktop using iPad as a second display. Now you can take everything you do above and beyond.
The macOS Catalina 10.15.3 update improves the stability, reliability, and security of your Mac.This update: • Optimizes gamma handling of low gray levels on Pro Display XDR for SDR workflows when using macOS • Improves multi-stream video editing performance for HEVC and H.264 encoded 4K video on the 16-inch MacBook Pro (2019)