MacOS Catalina

macOS Catalina (10.15) is a version of macOS that was released on 7 October 2019. This version drops support for 32-bit Macintosh applications.

It is also the last version of macOS to use the major version number of 10.

Features

 * Sidecar, iPad-based screen mirroring
 * Project Catalyst, iOS subsystem for macOS
 * Siri Shortcuts
 * Window Snapping
 * Music, Podcasts, and Apple TV, replacing iTunes
 * iOS device integration in Finder
 * Support for the Mac Pro (2019)
 * zsh as the default shell
 * Removal of Dashboard
 * Read-only System Partition
 * Apple Arcade