From 0ce45eb0b7ad0af28de4418906543c51dbc505cc Mon Sep 17 00:00:00 2001
From: Will Jiang <20015jjw@users.noreply.github.com>
Date: Wed, 6 Sep 2017 10:36:47 -0700
Subject: Update mac guide (#1665)

`avr-libc` is no longer, and it's called `avr-gcc` now. https://github.com/osx-cross/homebrew-avr

Also you need `gcc-arc-none-eabi` to be able to compile in my experience.
---
 docs/getting_started_build_tools.md | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/docs/getting_started_build_tools.md b/docs/getting_started_build_tools.md
index e46b7f2e53..10c0b6984d 100644
--- a/docs/getting_started_build_tools.md
+++ b/docs/getting_started_build_tools.md
@@ -40,8 +40,11 @@ Debian/Ubuntu example:
 If you're using [homebrew,](http://brew.sh/) you can use the following commands:
 
     brew tap osx-cross/avr
-    brew install avr-libc
+    brew tap PX4/homebrew-px4
+    brew update
+    brew install avr-gcc
     brew install dfu-programmer
+    brew install gcc-arm-none-eabi
 
 This is the recommended method. If you don't have homebrew, [install it!](http://brew.sh/) It's very much worth it for anyone who works in the command line. Note that the `make` and `make install` portion during the homebrew installation of avr-libc can take over 20 minutes and exhibit high CPU usage.
 
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