Add instructions for building on OSX

Author: DDRBoxman

README.md

@@ -22,4 +22,45 @@ window.obsstudio.pluginVersion
 window.obsstudio.onVisibilityChange(visiblity) {
 	
 };
-```
+```
+
+## Building on OSX
+
+### Building CEF
+#### Getting
+*  Download CEF Mac 64 from [https://cefbuilds.com/](https://cefbuilds.com/)
+  *  At the time of writing this I used build 2704
+*  Extract and cd into the folder
+
+#### Setting Up Project
+```
+mkdir build
+cmake -D CMAKE_XCODE_ATTRIBUTE_CLANG_CXX_LIBRARY=libc++ -G Xcode ..
+open cef.xcodeproj/
+```
+
+TODO: tell user to move stuff, or FindCEF.cmake
+
+#### Building
+Build in Xcode (⌘+B)
+
+### Building OBS and obs-browser
+#### Installing Dependencies
+```
+brew install ffmpeg x264 qt5 cmake
+```
+
+#### Setting Up Project
+```
+git clone --recursive https://github.com/jp9000/obs-studio.git
+cd ./obs-studio
+git clone [email protected]:kc5nra/obs-browser.git ./plugins/obs-browser
+echo "add_subdirectory(obs-browser)" >> ./plugins/CMakeLists.txt
+mkdir build
+cd ./build
+cmake -D CMAKE_PREFIX_PATH=/usr/local/opt/qt5/lib/cmake -D CEF_ROOT_DIR=/Users/username/Development/cef_binary_3.2704.1434.gec3e9ed_macosx64 -G Xcode ..
+open obs-studio.xcodeproj/
+```
+
+#### Building
+Build in Xcode (⌘+B)