diff --git a/doc/_readme/scripts/install_macos.sh b/doc/_readme/scripts/install_macos.sh
index 20cd3a47..afa44c3c 100644
--- a/doc/_readme/scripts/install_macos.sh
+++ b/doc/_readme/scripts/install_macos.sh
@@ -1,6 +1,6 @@
 # shellcheck disable=all
 brew update
-brew install llvm@18 bdw-gc openssl cjson libffi
+brew install llvm@18 bdw-gc openssl cjson libffi pkg-config
 brew install python@3.12 # optional
 brew link --force libffi
 go install -v github.com/goplus/llgo/cmd/llgo@latest