diff --git a/eng/install-native-dependencies.sh b/eng/install-native-dependencies.sh
index e2d82ddc86ff7e..b479a027ba1e76 100755
--- a/eng/install-native-dependencies.sh
+++ b/eng/install-native-dependencies.sh
@@ -40,6 +40,13 @@ case "$os" in
         export HOMEBREW_NO_INSTALLED_DEPENDENTS_CHECK=1
         # Skip brew update for now, see https://github.com/actions/setup-python/issues/577
         # brew update --preinstall
+
+        # Remove Homebrew LLVM if present. The CI runner image may ship with a
+        # Homebrew LLVM whose libraries (e.g., libunwind.dylib) are the wrong
+        # architecture or conflict with the Apple SDK, breaking native linking.
+        # The build uses Apple clang from /usr/bin/clang exclusively.
+        brew uninstall --ignore-dependencies llvm@18 2>/dev/null || true
+
         brew bundle --no-upgrade --file "$(dirname "$0")/Brewfile"
         ;;