* Update SDL and SDL_mixer on macOS * Extend (Intel) Mac compatibility all the way to OS X El Capitan * Update macOS runner due to GitHub deprecation but still use and Xcode version that supports 10.11
* Update SDL and SDL_mixer on macOS * Extend (Intel) Mac compatibility all the way to OS X El Capitan * Update macOS runner due to GitHub deprecation but still use and Xcode version that supports 10.11