first commit

.github/workflows/macos-voiceover.yml

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+name: MacOS VoiceOver
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  start-voiceover-and-move-right:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [macos-13, macos-14, macos-15]
+    steps:
+      - uses: actions/checkout@v3
+      - run: |
+          # Start VoiceOver
+          /System/Library/CoreServices/VoiceOver.app/Contents/MacOS/VoiceOverStarter
+
+          # Let VoiceOver startup (usually be more careful than hardcoded time!)
+          sleep 5
+
+          # Attempt to control VoiceOver using
+          /usr/bin/osascript voiceOver.applescript

README.md

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+# macos-15 VoiceOver Error Demo
+
+Simple workflow to demonstrate macos-15 issues with VoiceOver AppleScript support reported in https://github.com/actions/runner-images/issues/11257

voiceOver.applescript

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+tell application "VoiceOver"
+  -- Ensure VoiceOver is focused
+
+  activate
+
+  -- Attempt to move the VO cursor right 5 times.
+  -- This is where we can see evidence of macos-15 agents not having
+  -- AppleScript support enabled for VoiceOver as it errors with:
+  -- "execution error: VoiceOver got an error: AppleEvent handler failed. (-10000)"
+
+  tell vo cursor to move right
+  tell vo cursor to move right
+  tell vo cursor to move right
+  tell vo cursor to move right
+  tell vo cursor to move right
+
+end tell