Updated Building for macOS (markdown)

Building-for-macOS.md

@@ -4,9 +4,7 @@ It's recommended that you use [homebrew](http://brew.sh/) to install dependencie
 You'll need to download and install the following to build Citra:
 
 * [CMake](https://cmake.org/) (`brew install cmake`)
-* [Python 3](https://www.python.org/) (`brew install python3`)
-  * The version included with the default developer tools may run into an issue downloading Qt.
-* glslang (`brew install glslang`)
+* [glslang](https://github.com/KhronosGroup/glslang) (`brew install glslang`)
 * A recent version of Xcode and the Xcode command line tools
 
 ### Cloning Citra in Git:
@@ -22,11 +20,9 @@ Create a build folder and generate makefiles for the build:
 ```
 mkdir build
 cd build
-cmake .. -DCMAKE_OSX_ARCHITECTURES="x86_64;x86_64h" -DCMAKE_BUILD_TYPE=Release
+cmake ..
 ```
 
-This builds a fat binary that has slices targeting early and late x64 machines.
-
 ### Building Citra
 
 ```
@@ -40,7 +36,11 @@ A `citra-qt.app` application bundle will now be present under `build/bin/`. Note
 To build Citra targeting macOS on ARM, the process is largely the same.
 A few things to note are:
 * Make sure the Homebrew version you have installed is the ARM version 
-* If you are cross-compiling, when running the cmake command you'll want to use this command instead:
+* If you are cross-compiling from an x86_64 machine for ARM, when running the cmake command you'll want to use this command instead:
 ```
-cmake .. -DCMAKE_OSX_ARCHITECTURES="arm64" -DCMAKE_BUILD_TYPE=Release
+cmake .. -DCMAKE_OSX_ARCHITECTURES="arm64"
+```
+* Similarly, if you are cross-compiling from an ARM machine for x86_64, you'll want to use this command:
+```
+cmake .. -DCMAKE_OSX_ARCHITECTURES="x86_64"
 ```