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 f78016df9..76f5ee6f3 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
@@ -9,7 +9,11 @@ For further questions about Mac & Homebrew,  contact @Chrisfu  (https://github.c
 
 2. Tap this repo: `brew tap RfidResearchGroup/proxmark3`
 
-3. Install Proxmark3: `brew install proxmark3` for stable release or `brew install --HEAD proxmark3` for latest non-stable from GitHub.
+3. Install Proxmark3:
+  - (Optional) `export HOMEBREW_PROXMARK3_PLATFORM=xxxxxx` to specify [platform](https://github.com/RfidResearchGroup/proxmark3/blob/master/doc/md/Use_of_Proxmark/4_Advanced-compilation-parameters.md#platform), default value is `PM3RDV4` if none
+  - `brew install proxmark3` for stable release 
+  - `brew install --HEAD proxmark3` for latest non-stable from GitHub (use this if previous command fails)
+  - `brew install --with-blueshark proxmark3` for blueshark support
 
 For more info, go to https://github.com/RfidResearchGroup/homebrew-proxmark3