update README

shapeshed · Mar 6, 2013 · 4961aa4 · 4961aa4
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commit 4961aa4
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diff --git a/README.md b/README.md
@@ -17,3 +17,10 @@ The site is built on [flim](https://github.com/shapeshed/flim), a static site ge
 ## Deployment
 
     make deploy
+
+## OSX specific notes
+
+If you are on OSX the `Makefile` uses GNU sed and GNU md5sum. To install these on a Mac do
+
+    brew install --default-names gnu-sed
+    brew install md5sha1sum