diff --git a/doc/md/Installation_Instructions/Mac-OS-X-Homebrew-Installation-Instructions.md b/doc/md/Installation_Instructions/Mac-OS-X-Homebrew-Installation-Instructions.md
index dbd2b2636..fc3b51c47 100644
--- a/doc/md/Installation_Instructions/Mac-OS-X-Homebrew-Installation-Instructions.md
+++ b/doc/md/Installation_Instructions/Mac-OS-X-Homebrew-Installation-Instructions.md
@@ -18,11 +18,15 @@ Visual Studio Code still runs under Rosetta 2 and if you're developing for proxm
 
 ## Install Proxmark3 tools
 
-These instructions comes from @Chrisfu, where we got the proxmark3.rb scriptfile from.
-For further questions about Mac & Homebrew,  contact @Chrisfu  (https://github.com/chrisfu/)
+These instructions comes from \@Chrisfu, where we got the proxmark3.rb scriptfile from.
+For further questions about Mac & Homebrew, contact [\@Chrisfu on Twitter](https://github.com/chrisfu/)
+
+0. Install XCode Command Line Tools if you haven't yet already done so: `xcode-select --install`
 
 1. Install homebrew if you haven't yet already done so: http://brew.sh/
 
+2. Install xquartz: `brew install xquartz`
+
 2. Tap this repo: `brew tap RfidResearchGroup/proxmark3`
 
 3. Install Proxmark3: