macOS Catalina on the App Store
https://apps.apple.com/us/app/macos-catalina/id146684131404.10.2019 · macOS Catalina 10.15.7 provides important security updates and bug fixes for your Mac. • Resolves an issue where macOS would not automatically connect to Wi-Fi networks. • Fixes an issue that could prevent files syncing through iCloud Drive. • Addresses a graphic issue that may occur on iMac (Retina 5K, 27-inch, 2020) with Radeon Pro 5700 XT.