Collection of theoretical improvements for ATI cards, as well as a couple memory leaks. Thanks to Shyotl for bringing them up and offering solutions.

Signed-off-by: Beeks <HgDelirium@gmail.com>

indra/newview/llfloaterhardwaresettings.cpp

@@ -99,7 +99,17 @@ void LLFloaterHardwareSettings::refreshEnabledState()
 		!gGLManager.mHasVertexBufferObject)
 	{
 		childSetEnabled("vbo", FALSE);
+		//Streaming VBOs -Shyotl
+		childSetEnabled("vbo_stream", FALSE);
 	}
+	else
+#if LL_DARWIN
+		childSetEnabled("vbo_stream", FALSE); //Hardcoded disable on mac
+		childSetValue("vbo_stream", (LLSD::Boolean) FALSE); //Hardcoded disable on mac
+#else
+		childSetEnabled("vbo_stream", LLVertexBuffer::sEnableVBOs);
+#endif
+		
 
 	// if no windlight shaders, turn off nighttime brightness, gamma, and fog distance
 	childSetEnabled("gamma", !gPipeline.canUseWindLightShaders());