macOS: 10.13 should use OpenGL renderer

There appears to be a problem with SDL's Metal renderer under 10.13 (segfault on window creation).

1 files changed, 2 insertions, 0 deletions

diff --git a/src/macos.h b/src/macos.h
index 07990090..700d50f8 100644
--- a/src/macos.h
+++ b/src/macos.h
@@ -26,6 +26,8 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
 
 /* Platform-specific functionality for macOS */
 
+iBool   shouldDefaultToMetalRenderer_MacOS  (void);
+
 void    setupApplication_MacOS  (void);
 void    insertMenuItems_MacOS   (const char *menuLabel, int atIndex, const iMenuItem *items, size_t count);
 void    handleCommand_MacOS     (const char *cmd);