diff --git a/React/CoreModules/RCTDevLoadingView.mm b/React/CoreModules/RCTDevLoadingView.mm
index 427620e7802d37..020f3ab8c5709e 100644
--- a/React/CoreModules/RCTDevLoadingView.mm
+++ b/React/CoreModules/RCTDevLoadingView.mm
@@ -266,16 +266,21 @@ - (void)showProgressMessage:(NSString *)message
 
 - (void)showOfflineMessage
 {
-  RCTUIColor *color = [RCTUIColor whiteColor]; // TODO(macOS GH#774)
-  RCTUIColor *backgroundColor = [RCTUIColor blackColor]; // TODO(macOS GH#774)
-
-  if ([self isDarkModeEnabled]) {
-    color = [RCTUIColor blackColor]; // TODO(macOS GH#774)
-    backgroundColor = [RCTUIColor whiteColor]; // TODO(macOS GH#774)
-  }
+  // [TODO(macOS GH#774) - isDarkModeEnabled should only be run on the main thread
+  __weak __typeof(self) weakSelf = self;
+  RCTExecuteOnMainQueue(^{
+    RCTUIColor *color = [RCTUIColor whiteColor]; // TODO(macOS GH#774)
+    RCTUIColor *backgroundColor = [RCTUIColor blackColor]; // TODO(macOS GH#774)
+
+    if ([weakSelf isDarkModeEnabled]) {
+      color = [RCTUIColor blackColor]; // TODO(macOS GH#774)
+      backgroundColor = [RCTUIColor whiteColor]; // TODO(macOS GH#774)
+    }
 
-  NSString *message = [NSString stringWithFormat:@"Connect to %@ to develop JavaScript.", RCT_PACKAGER_NAME];
-  [self showMessage:message color:color backgroundColor:backgroundColor];
+    NSString *message = [NSString stringWithFormat:@"Connect to %@ to develop JavaScript.", RCT_PACKAGER_NAME];
+    [weakSelf showMessage:message color:color backgroundColor:backgroundColor];
+  });
+  // ]TODO(macOS GH#774)
 }
 
 - (BOOL)isDarkModeEnabled
diff --git a/packages/rn-tester/Podfile.lock b/packages/rn-tester/Podfile.lock
index 10c2079dea9c55..914d4dcb156270 100644
--- a/packages/rn-tester/Podfile.lock
+++ b/packages/rn-tester/Podfile.lock
@@ -542,8 +542,8 @@ SPEC CHECKSUMS:
   boost-for-react-native: 8f7c9ecfe357664c072ffbe2432569667cbf1f1b
   CocoaAsyncSocket: 065fd1e645c7abab64f7a6a2007a48038fdc6a99
   DoubleConversion: ed15e075aa758ac0e4c1f8b830bd4e4d40d669e8
-  FBLazyVector: 78833e5b71477e99d0c461260b15805300d8641a
-  FBReactNativeSpec: 443ba1d306c631c846dd7aca2a975387c9cc7bc7
+  FBLazyVector: ebf827c1137d58460e91013ad341f91a57ff2fd8
+  FBReactNativeSpec: f1236597074fcb9981477abfad7af8f97ea63fd6
   Flipper: 30e8eeeed6abdc98edaf32af0cda2f198be4b733
   Flipper-Boost-iOSX: fd1e2b8cbef7e662a122412d7ac5f5bea715403c
   Flipper-DoubleConversion: 57ffbe81ef95306cc9e69c4aa3aeeeeb58a6a28c
@@ -558,34 +558,34 @@ SPEC CHECKSUMS:
   libevent: 4049cae6c81cdb3654a443be001fb9bdceff7913
   OpenSSL-Universal: 1aa4f6a6ee7256b83db99ec1ccdaa80d10f9af9b
   RCT-Folly: 43adc9ce880eb76792f88c011773cb5c664c1419
-  RCTRequired: d93d172489b8c773611e3efd9e227f5364594dd6
-  RCTTypeSafety: 3fc1581c2a865e39da6f99845e0ac6a8d9264460
-  React: 2f225b706f487a4c28da24f397cf398ccd39e982
-  React-callinvoker: b405a5dddbe24432f30a609ade5a19b51a46664e
-  React-Core: c9f3e60e3317528fdf90b41626a4f05f947aee08
-  React-CoreModules: f72a78971f386eee4c2100819278316b6f877491
-  React-cxxreact: 918aea0822c0211558092ae051f51e67d5306cb0
-  React-jsi: 11cd72d65a3435ab8ff942f63070ff3152bf0865
-  React-jsiexecutor: cfd80e02b8374637f4916150d8ee0d5f17afb9d2
-  React-jsinspector: 3171bf801725090c0dacc3e262f98bed08d69fdc
-  React-logger: f0d2226ebca93060b9a823722d9fec2606d7e7fe
-  React-perflogger: a0318f108de40b646149abe1cc1e949e2ac666c2
-  React-RCTActionSheet: ab8183f6cc730c57f466a9278edb01077e8fedd0
-  React-RCTAnimation: 48abe93d62ba56c83860c8e4c8fc7864e79c4a32
-  React-RCTBlob: c09e48087fa0b1843b1e72c865d2942847c2177e
-  React-RCTImage: e5cc9ae582ebb8e522cbdb4f5832178b5f06f41a
-  React-RCTLinking: 8ede7e34da8c6b4a0d84e9cb6bd7cccdb194763b
-  React-RCTNetwork: baa74ca81816e4c2d0a35e8c8e5dc55556dceff2
-  React-RCTPushNotification: b6c085f1e2027651cf5c45f1404c685075fb6dae
-  React-RCTSettings: d1497a02d747b9a7125d3c13fc97a04a17cb625c
-  React-RCTTest: bfe35790510a0dadb4677b87eca86762e0ca6df9
-  React-RCTText: 5268eb98f9ed610f06a41f2713fe029cfb0d159c
-  React-RCTVibration: 2374c6ae5cd333aecc32207780ba42d090b8e549
-  React-runtimeexecutor: de57453247bb893e197996c97355de11be14687d
+  RCTRequired: 70d6e44fd49b73a356ace7fff03ebd6a6055a794
+  RCTTypeSafety: 853cc09650317f266858fe64a49adfade5bdb507
+  React: 2f28a8887149351ae6c3d5ad99e81b7fbc3cd3a0
+  React-callinvoker: 32aac90d294beacf1b87a557281683979ced1b2e
+  React-Core: 056be4275ad4304b50962d6b1a502559083caf33
+  React-CoreModules: 4d907f698dc3174a1ec7af7651a8feb75d03bf01
+  React-cxxreact: a5b4f5c5f2cf058db8008093524e90adba16206f
+  React-jsi: 6b41823090b72f585e7ef1145edb0466eafe86e8
+  React-jsiexecutor: 6dee4b37eb64deb7a097d3f3f69d524855e5e017
+  React-jsinspector: d3a00e805958a9573a635f6fe131c27e0facc08c
+  React-logger: 2985e43d81170e89d8c0e3d7d9ae89e3e15a0862
+  React-perflogger: 45719a6d33b673135604f4910d61a1c4174aba79
+  React-RCTActionSheet: 4f70b3466af85f80b1047849db4266ca9c1c8a90
+  React-RCTAnimation: 8c1e372a3b726e0fce6585be11b79f73a7752720
+  React-RCTBlob: ace846e33dbe865f95255dc170342aa92760f618
+  React-RCTImage: 3c9592dd1a890524d4e01d2bd521c5f8cb59b3b0
+  React-RCTLinking: e2ffc806b5fbab75c5954361f9596c0f97c31efc
+  React-RCTNetwork: 7ac78536ca124d22f7dd93287b411c8a03835a91
+  React-RCTPushNotification: 032269ce39273b745723188b2173a47c32ed265b
+  React-RCTSettings: a7ae59ca4bc6c095cc77111964b5b48439f0e1f4
+  React-RCTTest: 63650a03894db33e06a9847ee08b71d14f6743b1
+  React-RCTText: a1a62bb79c18818ac340e3929b64a7741769b317
+  React-RCTVibration: 0252fc1d2e4d7487f24a61d0ba420e92c7a3fcc3
+  React-runtimeexecutor: b43eb92fa9bc1475a67dfd39c6c7f6b973cd0c3d
   React-TurboModuleCxx-RNW: f2e32cbfced49190a61d66c993a8975de79a158a
-  React-TurboModuleCxx-WinRTPort: 42aadf2acef5d136d987df13aef3f0f2487a4aba
-  ReactCommon: fd25a74759c207c56ac433e996fa19ad9c4b5a04
-  Yoga: 602a226654e13710c61f951673946820bef68ce9
+  React-TurboModuleCxx-WinRTPort: 33943de08957f524b0b24f1e7466fee879807ae6
+  ReactCommon: d849454f42b3b5a84b064426940477cd6cfd6678
+  Yoga: b5ccb900d6ff873c37ad1b40d4d9f68bde5e685d
   YogaKit: f782866e155069a2cca2517aafea43200b01fd5a
 
 PODFILE CHECKSUM: c7a7110b242497f2bf323ba74caedb9ee61ee05e