- OK, so we can't have vid_maxfps on OS X since there does not appear to be an equivalent to POSIX timers. The only thing I could find would require Objective-C and an event loop.

SVN r3892 (trunk)

src/sdl/hardware.cpp

@@ -190,10 +190,11 @@ void I_ClosestResolution (int *width, int *height, int bits)
 // Pass a negative value for the limit to use the value of vid_maxfps.
 //
 //==========================================================================
-
+
 EXTERN_CVAR(Int, vid_maxfps);
 EXTERN_CVAR(Bool, cl_capfps);
-
+
+#ifndef __APPLE__
 Semaphore FPSLimitSemaphore;
 
 static void FPSLimitNotify(sigval val)
@@ -244,7 +245,14 @@ void I_SetFPSLimit(int limit)
 			Printf("Failed to set FPS limitter timer\n");
 		DPrintf("FPS timer set to %u ms\n", (unsigned int) period.it_interval.tv_nsec / 1000000);
 	}
-}
+}
+#else
+// So Apple doesn't support POSIX timers and I can't find a good substitute short of
+// having Objective-C Cocoa events or something like that.
+void I_SetFPSLimit(int limit)
+{
+}
+#endif
 
 CUSTOM_CVAR (Int, vid_maxfps, 200, CVAR_ARCHIVE | CVAR_GLOBALCONFIG)
 {