make OpenGL default render method on OS X

Currently the "simple" render method is way too slow on OS X, while
Cairo is completely broken. The OpenGL renderer, on the other hand, runs
with almost no stuttering.

Also fix dangling icon file after OS X build.

src/wx/CMakeLists.txt

@@ -215,8 +215,7 @@ ENDIF(NOT WIN32 AND NOT APPLE)
 if(APPLE)
     # this should set ROM file types correctly
     SET_PROPERTY(TARGET visualboyadvance-m APPEND PROPERTY MACOSX_BUNDLE_INFO_PLIST ${CMAKE_CURRENT_SOURCE_DIR}/wxplist.in)
-    file(COPY ${CMAKE_CURRENT_SOURCE_DIR}/icons/vbam.icns DESTINATION ${CMAKE_CURRENT_SOURCE_DIR})
-    SET(MACOSX_BUNDLE_ICON_FILE vbam.icns)
+    SET(MACOSX_BUNDLE_ICON_FILE ${VBAM_ICON})
     SET_SOURCE_FILES_PROPERTIES(${VBAM_ICON} PROPERTIES MACOSX_PACKAGE_LOCATION Resources)
 endif(APPLE)
 

src/wx/opts.cpp

@@ -276,6 +276,7 @@ opts_t::opts_t()
 #else
 #ifdef __WXMAC__
     audio_api     = AUD_OPENAL;
+    render_method = RND_OPENGL;
 #endif
 #endif
     video_scale = 3;