diff --git a/vm/os-macosx.mm b/vm/os-macosx.mm
index a4b2191100..394198521f 100644
--- a/vm/os-macosx.mm
+++ b/vm/os-macosx.mm
@@ -31,7 +31,7 @@ void early_init(void)
 {
 	SInt32 version;
 	Gestalt(gestaltSystemVersion,&version);
-	if(version <= 0x1050)
+	if(version < 0x1050)
 	{
 		printf("Factor requires Mac OS X 10.5 or later.\n");
 		exit(1);