Fix macOS CI: run tests in user login session for Mach port rendezvous

GitHub Actions macos-14 runners execute jobs in a background bootstrap
domain where child processes cannot look up MachPortRendezvousServer
(error 1102 / BOOTSTRAP_UNKNOWN_SERVICE), causing the network service
and renderer subprocesses to terminate immediately and OnContextInitialized
to never fire.

Fix: run the test step via "sudo launchctl asuser $(id -u)" so the CEF
browser process lives in the user's login session bootstrap domain,
where its registered Mach rendezvous service is visible to all children.

Also add --use-mock-keychain to MAC switches in both test files, matching
CEF's own macOS test infrastructure (client_app_browser.cc) to prevent
keychain authorization prompts from blocking initialization.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: linesight

.github/workflows/ci-macos.yml

@@ -120,9 +120,11 @@ jobs:
           chmod +x cefpython3/subprocess
 
       - name: Run unit tests
-        run: python unittests/_test_runner.py
-        env:
-          PYTHONPATH: ${{ github.workspace }}
+        run: |
+          python_bin="$(which python)"
+          sudo launchctl asuser "$(id -u)" \
+            /usr/bin/env PYTHONPATH="${{ github.workspace }}" \
+            "$python_bin" unittests/_test_runner.py
 
   wheel:
     needs: test

unittests/main_test.py

@@ -159,15 +159,19 @@ def test_main(self):
             switches["in-process-gpu"] = ""
             switches["no-zygote"] = ""
         if MAC:
-            # Mach port rendezvous (bootstrap_look_up) fails for child
-            # processes on macOS CI runners regardless of --no-sandbox.
-            # Single-process mode runs renderer/network/GPU in-process,
-            # eliminating all subprocess spawning and bootstrap IPC.
-            switches["single-process"] = ""
+            # macOS CI runners run in a background bootstrap domain where
+            # MachPortRendezvousServer lookups fail for child processes.
+            # The CI workflow runs tests via "launchctl asuser" to place the
+            # browser process in the user's login session bootstrap domain.
+            # These switches add further subprocess-spawn reduction as guards.
             switches["no-sandbox"] = ""
             switches["disable-gpu"] = ""
             switches["disable-gpu-compositing"] = ""
             switches["in-process-gpu"] = ""
+            switches["single-process"] = ""
+            # Prevent macOS keychain authorization prompts during init
+            # (matches CEF's own test infrastructure on macOS).
+            switches["use-mock-keychain"] = ""
         cef.Initialize(settings, switches=switches)
         subtest_message("cef.Initialize() ok")
 

unittests/osr_test.py

@@ -127,13 +127,17 @@ def test_osr(self):
             switches["in-process-gpu"] = ""
             switches["no-zygote"] = ""
         if MAC:
-            # Mach port rendezvous (bootstrap_look_up) fails for child
-            # processes on macOS CI runners regardless of --no-sandbox.
-            # Single-process mode runs renderer/network/GPU in-process,
-            # eliminating all subprocess spawning and bootstrap IPC.
-            switches["single-process"] = ""
+            # macOS CI runners run in a background bootstrap domain where
+            # MachPortRendezvousServer lookups fail for child processes.
+            # The CI workflow runs tests via "launchctl asuser" to place the
+            # browser process in the user's login session bootstrap domain.
+            # These switches add further subprocess-spawn reduction as guards.
             switches["no-sandbox"] = ""
             switches["in-process-gpu"] = ""
+            switches["single-process"] = ""
+            # Prevent macOS keychain authorization prompts during init
+            # (matches CEF's own test infrastructure on macOS).
+            switches["use-mock-keychain"] = ""
         browser_settings = {
             # Tweaking OSR performance (Issue #240)
             "windowless_frame_rate": 30,  # Default frame rate in CEF is 30