--- a/security/sandbox/mac/Sandbox.mm
+++ b/security/sandbox/mac/Sandbox.mm
@@ -157,16 +157,18 @@ bool StartMacSandbox(MacSandboxInfo aInf
       params.push_back("SANDBOX_LEVEL_1");
       params.push_back(aInfo.level == 1 ? "TRUE" : "FALSE");
       params.push_back("SANDBOX_LEVEL_2");
       params.push_back(aInfo.level == 2 ? "TRUE" : "FALSE");
       params.push_back("SANDBOX_LEVEL_3");
       params.push_back(aInfo.level == 3 ? "TRUE" : "FALSE");
       params.push_back("MAC_OS_MINOR_9");
       params.push_back(OSXVersion::OSXVersionMinor() == 9 ? "TRUE" : "FALSE");
+      params.push_back("MAC_OS_MINOR_MIN_13");
+      params.push_back(OSXVersion::OSXVersionMinor() >= 13 ? "TRUE" : "FALSE");
       params.push_back("APP_PATH");
       params.push_back(aInfo.appPath.c_str());
       params.push_back("APP_BINARY_PATH");
       params.push_back(aInfo.appBinaryPath.c_str());
       params.push_back("APP_DIR");
       params.push_back(aInfo.appDir.c_str());
       params.push_back("APP_TEMP_DIR");
       params.push_back(aInfo.appTempDir.c_str());

--- a/security/sandbox/mac/SandboxPolicies.h
+++ b/security/sandbox/mac/SandboxPolicies.h
@@ -50,16 +50,17 @@ static const char widevinePluginSandboxR
 static const char contentSandboxRules[] = R"(
   (version 1)
 
   (define should-log (param "SHOULD_LOG"))
   (define sandbox-level-1 (param "SANDBOX_LEVEL_1"))
   (define sandbox-level-2 (param "SANDBOX_LEVEL_2"))
   (define sandbox-level-3 (param "SANDBOX_LEVEL_3"))
   (define macosMinorVersion-9 (param "MAC_OS_MINOR_9"))
+  (define macosMinorVersion-min13 (param "MAC_OS_MINOR_MIN_13"))
   (define appPath (param "APP_PATH"))
   (define appBinaryPath (param "APP_BINARY_PATH"))
   (define appdir-path (param "APP_DIR"))
   (define appTempDir (param "APP_TEMP_DIR"))
   (define hasProfileDir (param "HAS_SANDBOXED_PROFILE"))
   (define profileDir (param "PROFILE_DIR"))
   (define home-path (param "HOME_PATH"))
   (define hasFilePrivileges (param "HAS_FILE_PRIVILEGES"))
@@ -156,16 +157,20 @@ static const char contentSandboxRules[] 
       (global-name "com.apple.cookied")
       (global-name "com.apple.cache_delete")
       (global-name "com.apple.pluginkit.pkd")
       (global-name "com.apple.bird")
       (global-name "com.apple.ocspd")
       (global-name "com.apple.cmio.AppleCameraAssistant")
       (global-name "com.apple.DesktopServicesHelper"))
 
+; bug 1376163
+  (if (string=? macosMinorVersion-min13 "TRUE")
+    (allow mach-lookup (global-name "com.apple.audio.AudioComponentRegistrar")))
+
 ; bug 1312273
   (if (string=? macosMinorVersion-9 "TRUE")
      (allow mach-lookup (global-name "com.apple.xpcd")))
 
   (allow iokit-open
       (iokit-user-client-class "IOHIDParamUserClient")
       (iokit-user-client-class "IOAudioControlUserClient")
       (iokit-user-client-class "IOAudioEngineUserClient")