Once the patch is applied, you can launch Garry's Mod. On Apple Silicon Macs, the game will run via with surprisingly high performance, often maintaining 60+ FPS even with numerous addons. Requirement Minimum Spec OS macOS 10.15 (Catalina) or later (required for 64-bit) Processor Intel Core 2 Duo or Apple Silicon (M1/M2/M3) RAM 4 GB (8 GB recommended) Storage 5 GB for base game; 20+ GB recommended for addons Save 50% on Garry's Mod on Steam
: Get the latest macOS version from the GModCEFCodecFix GitHub or use the simplified guide at Solstice Game Studios . Make Executable : Open your Terminal application. Type chmod +x (with a space at the end). Gmod Install Mac Direct
Before downloading the patch, you must switch your game version within the Steam Client : Once the patch is applied, you can launch Garry's Mod
: In the "Beta Participation" dropdown, select x86-64 - Chromium + 64-bit Binaries . Make Executable : Open your Terminal application
Even with the 64-bit version, many Mac users experience a "frozen loading screen" or missing main menu because of incompatible web codecs. The is the standard community solution.
To play GMod natively on macOS (including Intel and Apple Silicon like M1/M2/M3), you must use a specific 64-bit beta branch and a community-made patch. 1. Enable the 64-Bit Beta Branch
: Steam will automatically begin a small download to update your game files to the 64-bit version. 2. Apply the GMod CEF Codec Fix