diff --git a/src/backend/x11.c b/src/backend/x11.c
index 72e54f3..755da71 100644
--- a/src/backend/x11.c
+++ b/src/backend/x11.c
@@ -1292,7 +1292,11 @@ static int MwLLX11CallInitImpl(void) {
 		return 1;
 	}
 
+#ifdef __APPLE__
+	xsymtbl.lib_xlib = MwDynamicOpen("libX11.dylib");
+#else
 	xsymtbl.lib_xlib = MwDynamicOpen("libX11.so");
+#endif
 	if(!xsymtbl.lib_xlib) {
 		return 1;
 	}