As of July 2025, Google has announced that Chrome version 138 will be the final release supporting macOS 11 Big Sur. Subsequent versions, starting with Chrome 139 scheduled for release on August 5, 2025, will require macOS 12 Monterey or later. ([macobserver.com](https://www.macobserver.com/news/google-drops-chrome-support-for-macos-big-sur-only-firefox-and-edge-remain/?utm_source=openai))
Current Browser Support Landscape
With this development, users of macOS Big Sur are left with limited options for secure web browsing. Apple’s Safari ceased support for Big Sur in July 2023 with version 16.6, necessitating macOS Ventura or newer for subsequent updates. This leaves Mozilla Firefox and Microsoft Edge as the primary browsers still offering updates compatible with macOS 11. As of July 16, 2025, Firefox version 140.0.4 supports macOS 10.15 Catalina and newer. Microsoft Edge version 128 also supports Catalina, but the upcoming Edge version 129, expected in September, will require at least macOS Big Sur. ([macobserver.com](https://www.macobserver.com/news/google-drops-chrome-support-for-macos-big-sur-only-firefox-and-edge-remain/?utm_source=openai))
Security Implications of Using Outdated Software
Continuing to use browsers that no longer receive updates poses significant security risks. Outdated software becomes vulnerable to exploits, as security patches are no longer provided. Apple has emphasized that browsers are common targets for attacks, and maintaining up-to-date software is crucial for security. ([macobserver.com](https://www.macobserver.com/news/google-drops-chrome-support-for-macos-big-sur-only-firefox-and-edge-remain/?utm_source=openai))
Recommendations for macOS Big Sur Users
Users still operating on macOS Big Sur have two primary options:
1. Upgrade the Operating System: If the hardware supports it, updating to macOS Monterey or a newer version will ensure compatibility with the latest browser versions and security updates.
2. Switch Browsers Temporarily: Transitioning to Firefox or Edge can serve as a temporary solution. However, it’s important to note that support for older operating systems may eventually be phased out by these browsers as well.
Conclusion
The cessation of Chrome support for macOS Big Sur underscores the importance of keeping operating systems and applications up to date. To maintain optimal security and functionality, users are encouraged to upgrade their systems or transition to supported browsers promptly.
