diff --git a/.github/workflows/macos-release-build.yml b/.github/workflows/macos-release-build.yml
index a07dd802e..80c7863e1 100644
--- a/.github/workflows/macos-release-build.yml
+++ b/.github/workflows/macos-release-build.yml
@@ -15,7 +15,7 @@ on:
 jobs:
   mac-build:
     name: Build macOS - ${{ matrix.arch }}
-    runs-on: ${{ inputs.release-branch == 'release' && 'warp-macos-14-arm64-8x' || 'macos-14' }}
+    runs-on: ${{ inputs.release-branch == 'release' && 'warp-macos-14-arm64-6x' || 'macos-14' }}
 
     strategy:
       fail-fast: false
diff --git a/configs/macos/mozconfig b/configs/macos/mozconfig
index 7528354cf..2d36fe246 100644
--- a/configs/macos/mozconfig
+++ b/configs/macos/mozconfig
@@ -6,6 +6,10 @@ ac_add_options --enable-eme=widevine
 export MOZ_MACBUNDLE_ID=${appId}
 export MOZ_MACBUNDLE_NAME="Zen Browser.app"
 
+# override LTO settings, for now...
+export MOZ_LTO=cross,thin
+ac_add_options --enable-lto=cross,thin
+
 if test "$ZEN_RELEASE"; then
   if test "$ZEN_GA_DISABLE_PGO"; then
     export ZEN_DUMMY=1