Updated 11 Building on MacOS (markdown)

11-Building-on-MacOS.md

@@ -4,10 +4,14 @@ Reminder: Don't forget to checkout submodules!  `git submodule update --init --r
 
 # Building on an Intel Mac
 
-Build the dependencies using the CI's build script: `.github/workflows/scripts/macos/build-dependencies.sh deps` (this will build the dependencies into the directory `deps`).  If you want to use a package manager, you can look at the install script to see the required dependencies.
+Build the dependencies using the CI's build script: `.github/workflows/scripts/macos/build-dependencies.sh deps` (this will build the dependencies into the directory `deps`).  If you want to use a package manager, you can look at the install script to see the required dependencies.  Note that we patch extra features into `libshaderc`, so you will need to compile that one yourself, as the package manager's version will not work.
+
+You can set the environment variable `BUILD_FFMPEG=0` to tell the dependency build script to build all the dependencies except ffmpeg, allowing you to use your homebrew or macports-installed ffmpeg, which probably has more features enabled than the build script's.
 
 Building on an Intel Mac should work similarly to building on Linux.  Run cmake with `cmake /path/to/pcsx2/source -DCMAKE_PREFIX_PATH=/path/to/deps -DCMAKE_BUILD_TYPE=Release`, then `make`.  The final `.app` will be in `pcsx2-qt/PCSX2.app` in the build directory.  (The `CMAKE_PREFIX_PATH` is only needed if you used the CI's build script to install dependencies.)
 
+Add `-DUSE_LINKED_FFMPEG=ON` for video capture support.
+
 # Building on an arm (Apple Silicon) Mac
 
 **PCSX2 does not support building for arm.  You will need to make Intel builds even on Apple Silicon and run them in Rosetta.**