diff --git a/.github/workflows/go.yml b/.github/workflows/go.yml
index 4cf46e31..488e73c3 100644
--- a/.github/workflows/go.yml
+++ b/.github/workflows/go.yml
@@ -43,8 +43,8 @@ jobs:
         run: |
           brew update
           brew install llvm@${{matrix.llvm}} bdw-gc openssl libffi
+          brew link --force libffi
           echo "$(brew --prefix llvm@${{matrix.llvm}})/bin" >> $GITHUB_PATH
-          echo "PKG_CONFIG_PATH=/opt/homebrew/opt/libffi/lib/pkgconfig" >> $GITHUB_ENV
 
           # Install optional deps for demos.
           #
diff --git a/README.md b/README.md
index 3f6203be..e5700d48 100644
--- a/README.md
+++ b/README.md
@@ -358,9 +358,11 @@ Follow these steps to generate the `llgo` command (its usage is the same as the
 
 ```sh
 brew update
-brew install llvm@18 bdw-gc openssl cjson
+brew install llvm@18 bdw-gc openssl cjson libffi
 brew install python@3.12 # optional
+brew link --force libffi
 go install -v github.com/goplus/llgo/cmd/llgo@latest
+
 ```
 
 ### on Linux (Debian/Ubuntu)
diff --git a/doc/_readme/scripts/install_macos.sh b/doc/_readme/scripts/install_macos.sh
index 07c83514..20cd3a47 100644
--- a/doc/_readme/scripts/install_macos.sh
+++ b/doc/_readme/scripts/install_macos.sh
@@ -1,5 +1,6 @@
 # shellcheck disable=all
 brew update
-brew install llvm@18 bdw-gc openssl cjson
+brew install llvm@18 bdw-gc openssl cjson libffi
 brew install python@3.12 # optional
-go install -v github.com/goplus/llgo/cmd/llgo@latest
\ No newline at end of file
+brew link --force libffi
+go install -v github.com/goplus/llgo/cmd/llgo@latest