circle.yml in mittsu-0.1.7 vs circle.yml in mittsu-0.2.0

@@ -1,23 +1,23 @@
 ## Customize the test machine
 machine:
+  xcode:
+    version: 8.2
+
   environment:
     MITTSU_LIBGLFW_PATH: /usr/local/lib
-    MITTSU_LIBGLFW_FILE: libglfw.so
+    MITTSU_LIBGLFW_FILE: libglfw.dylib
     MINITEST_REPORTER: JUnit
 
   # Version of ruby to use
   ruby:
     version:
       2.0.0
 
 ## Customize dependencies
 dependencies:
-  cache_directories:
-    - glfw-3.1.2
   pre:
-    - sudo apt-get update; sudo apt-get install cmake xorg-dev libgl1-mesa-dev
-    - bash ./install-glfw-3.1.2.sh
+    - brew install glfw
 
 test:
   post:
     - mkdir -p $CIRCLE_TEST_REPORTS/minitest/
     - cp -r test/reports/*.xml $CIRCLE_TEST_REPORTS/minitest/