The transition away from macOS Catalina marked a significant shift in how Apple users interact with their operating systems. While Catalina introduced important changes like Sidecar and Apple Music, macOS Big Sur and later versions delivered a more profound evolution. This period represents a move towards a more unified design language and a foundation for the future of Apple silicon.
The Visual and Architectural Overhaul
One of the most immediate changes users encountered was the visual redesign that arrived with macOS Big Sur. The interface moved away from the stark, flat aesthetics of Catalina towards softer, rounded corners and a more vibrant color scheme. This new design language brought a sense of depth and personality to the Dock, menus, and system buttons, creating a more inviting and modern user experience that defined the era after Catalina.
Performance and the Apple Silicon Revolution
Perhaps the most impactful change following Catalina was the transition to Apple Silicon. macOS Catalina was the last major release to run exclusively on Intel processors, but the groundwork was laid for an entirely new architecture. The subsequent shift to M1, M2, and M3 chips delivered staggering improvements in performance and energy efficiency. Users experienced significantly faster application launch times, near-instant wake from sleep, and dramatically extended battery life, fundamentally changing the performance envelope of the Mac.
Enhanced Continuity Features
Apple has always emphasized ecosystem integration, and the period after Catalina saw these capabilities reach new heights. Features like Universal Control, which allows a single keyboard and mouse to control multiple Macs and iPads, and the expanded Sidecar functionality, turned the iPad into a truly versatile secondary display. Handoff became more seamless, and the integration between macOS, iOS, and iPadOS created a more cohesive and productive user journey across all Apple devices.
Security and Privacy Reinforcements
With each new operating system, Apple continued to strengthen its commitment to user privacy. The security model introduced with Catalina, which limited app access to the Files and Downloads folders, was refined and expanded. Features like Mail Privacy Protection, which hides the user's IP address to prevent tracking, and the more intelligent Intelligent Tracking Prevention, became standard. This focus on safeguarding user data became a core differentiator in the competitive landscape.
Refined Built-in Applications
The built-in applications received significant attention in the updates following Catalina. The Notes app gained robust document scanning and drawing tools, while the Stocks and Home apps were finally introduced to the Mac, bringing parity with the iPhone and iPad. The Messages app saw long-awaited quality-of-life improvements, including the ability to edit sent messages and mention specific people in a group chat, making digital communication more fluid and user-friendly.
The Introduction of New System Features
Beyond refining existing tools, this era introduced entirely new functionalities. The App Library, which automatically organizes apps into categorized collections, reduced clutter and simplified the application launch process. The improved Safari browser brought a fresh look with customizable start pages and powerful new privacy reports, challenging the dominance of other web browsers and setting a new standard for web browsing on the Mac.
