Colossus
Colossus is an open-source chess engine for macOS that provides AI-powered chess analysis and play. It is used by chess enthusiasts and players who want to analyse positions, run engine evaluations, or play against a computer opponent. The engine integrates with standard chess applications and GUIs on Mac, allowing users to offload computation-heavy position analysis to the Colossus binary. It is maintained as an open-source project and is available free of charge.
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1 suggestionColossus is an open-source chess engine maintained on SourceForge. The search results show a recent release (version 0.13.1) that includes precompiled binaries for arm64 architecture, indicating that a native Apple Silicon build does exist in the project. However, we cannot confirm with certainty that the standard macOS distribution of Colossus ships the arm64 binary by default — chess engines are often bundled inside third-party chess GUIs rather than run standalone, and the exact packaging varies by distribution channel. We recommend visiting the SourceForge project page (sourceforge.net/projects/colossus) to download the latest release and verify that you are getting the arm64 binary for your M-series Mac. If you use Colossus through a third-party chess application (such as Chess.com or Lichess), contact that application's vendor to confirm they ship a native build — the engine alone being native is not enough if the host GUI is still Intel-only.
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