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Install Steam on Apple M1+ without Rosetta

·1 min

Steps #

  1. Download Valve’s current universal bootstrapper:
curl -fL "https://client-update.steamstatic.com/appdmg_osx.zip.984652b88a9737e3f4e77c656d9ffa67d5042c2c" -o ~/Downloads/appdmg_osx.zip
  1. Verify SHA-256:
shasum -a 256 ~/Downloads/appdmg_osx.zip

Expected:

8bf4ce8b4bcbc50f642988c955559f605e7a877372116e7a2b3fd1355004bedb
  1. Extract and install:
mkdir -p /tmp/steam-arm64-install
unzip -q ~/Downloads/appdmg_osx.zip -d /tmp/steam-arm64-install
tar xzf /tmp/steam-arm64-install/SteamMacBootstrapper.tar.gz -C /tmp/steam-arm64-install
cp -R /tmp/steam-arm64-install/Steam.app /Applications/
  1. Verify Valve signature:
codesign -dv /Applications/Steam.app 2>&1 | grep TeamIdentifier

Expected:

TeamIdentifier=MXGJJ98X76
  1. Opt into Steam beta so native Apple Silicon client updates install:
mkdir -p "$HOME/Library/Application Support/Steam/package"
printf 'publicbeta\n' > "$HOME/Library/Application Support/Steam/package/beta"
  1. Launch Steam from /Applications.

Notes #

  • This installs Steam itself without Rosetta. Some games may still require Rosetta.
  • If Gatekeeper warns on first launch, right-click Steam.app and choose Open.