diff --git a/sys/unix/hints/macOS.500 b/sys/unix/hints/macOS.500
index 679fa415d..d84baa7c6 100755
--- a/sys/unix/hints/macOS.500
+++ b/sys/unix/hints/macOS.500
@@ -121,7 +121,8 @@ NHCFLAGS+=-DDLB
 NHCFLAGS+=-DHACKDIR=\"$(HACKDIR)\"
 NHCFLAGS+=-DDEFAULT_WINDOW_SYS=\"$(WANT_DEFAULT)\"
 NHCFLAGS+=-DSYSCF -DSYSCF_FILE=\"$(HACKDIR)/sysconf\" -DSECURE
-#NHCFLAGS+=-DTIMED_DELAY
+#define this after Qt timed_delay fix
+NHCFLAGS+=-DTIMED_DELAY
 #NHCFLAGS+=-DDUMPLOG
 #NHCFLAGS+=-DCONFIG_ERROR_SECURE=FALSE
 NHCFLAGS+=-DGREPPATH=\"/usr/bin/grep\"