diff --git a/dist/index.js b/dist/index.js
index a0474e18a..9f68aea27 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -92683,6 +92683,8 @@ function validateRubyEngineAndVersion(platform, engineVersions, engine, parsedVe
         But of course you should consider dropping support for these long-EOL Rubies, which cannot even be built on recent macOS machines.`)
   } else if (engine === 'truffleruby' && platform.startsWith('windows')) {
     throw new Error('TruffleRuby does not currently support Windows.')
+  } else if (engine === 'truffleruby' && platform.startsWith('macos') && os.arch() === 'x64' && common.floatVersion(version) >= 34.0) {
+    throw new Error('TruffleRuby 34+ no longer supports macOS Intel, please exclude that combination from CI.')
   }
 
   return version
diff --git a/index.js b/index.js
index e898dbb7a..4edc71614 100644
--- a/index.js
+++ b/index.js
@@ -196,6 +196,8 @@ function validateRubyEngineAndVersion(platform, engineVersions, engine, parsedVe
         But of course you should consider dropping support for these long-EOL Rubies, which cannot even be built on recent macOS machines.`)
   } else if (engine === 'truffleruby' && platform.startsWith('windows')) {
     throw new Error('TruffleRuby does not currently support Windows.')
+  } else if (engine === 'truffleruby' && platform.startsWith('macos') && os.arch() === 'x64' && common.floatVersion(version) >= 34.0) {
+    throw new Error('TruffleRuby 34+ no longer supports macOS Intel, please exclude that combination from CI.')
   }
 
   return version