diff --git a/eng/common/native/install-dependencies.sh b/eng/common/native/install-dependencies.sh
index 4742177a7685d5..23b42886236ff6 100755
--- a/eng/common/native/install-dependencies.sh
+++ b/eng/common/native/install-dependencies.sh
@@ -47,6 +47,13 @@ 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=- <<EOF
 brew "cmake"
 brew "icu4c"