Steam will no longer work on macOS Big Sur after October 15—Mac users must upgrade to macOS 12 or later.
Matilda
Steam Ends Support for macOS Big Sur This October Steam macOS 12 Requirement Begins October 15 Steam is officially ending support for macOS 11 Big Sur on October 15, 2025. This change means Mac users must upgrade to macOS 12 Monterey or later to continue using the Steam platform. The shift is primarily due to Steam’s reliance on an embedded version of Google Chrome that no longer functions on older macOS versions. Additionally, future updates will demand security features only available in macOS 12 and above. The Steam macOS 12 requirement is not just a technical update—it’s a necessary move to enhance performance, protect user data, and align with Apple’s evolving ecosystem. Image : Google Why Steam Is Dropping macOS Big Sur Valve, the company behind Steam, explained that the embedded Chromium engine used within the Steam client has stopped working on Big Sur. More importantly, Apple ended security updates for macOS 11 back in 2023, leaving systems increasingly vulnerable to malware and exploits. This raises concerns about compromised S…
