diff --git a/README.md b/README.md
index 24ca031..e8a437a 100644
--- a/README.md
+++ b/README.md
@@ -5,5 +5,8 @@ Script and Brewfiles to setup a Mac for development.
 ## Instructions
 
 ```sh
+# Install Xcode
+$ xcode-select --install
+# Run script
 $ curl -s https://raw.githubusercontent.com/danbee/mac-setup/master/setup.sh | sh
 ```