MacOS Catalina

macOS Catalina (10.15) is a version of macOS that was released on 7 October 2019. This version drops support that devices can update by replacing the graphic cards from OpenGL to Metal.

This version does not support 32-bit macOS applications. It is also the last version of macOS to use the major version number of 10. Most builds of Catalina were compiled for x86_64 (for public use) and ARM64 (for testing purposes for the transition to Apple Silicon, which would continue until the announcement in 2020).

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 Intel Ice Lake, Comet Lake-S, Cascade Lake-W processors and support for Intel Ice Lake iGPU and AMD Radeon RDNA1 graphics cards.
 * zsh as the default shell
 * Removal of Dashboard
 * Read-only System Partition
 * Apple Arcade