ctest: mac: improve fixture startup delay

Co-developed-by: Gemini 2.5 Pro

Author: lws-team

scripts/ctest-background.sh

@@ -24,15 +24,15 @@ if [ -z "${SAI_LIST_PORT}" ] ; then
 		sleep 1
 	fi
 else
-       if [ "${VENDOR}" = "apple" ] ; then
-               while [ -z "`netstat -an | grep LISTEN | tr -s ' ' | cut -d' ' -f4| grep "\.${SAI_LIST_PORT}\$"`" ] ; do
-                       sleep 0.5
-               done
-       else
-               while [ -z "`netstat -ltn4 | grep LISTEN | tr -s ' ' | grep ":${SAI_LIST_PORT}\ "`" ] ; do
-                       sleep 0.5
-               done
-       fi
+	if [ "${VENDOR}" = "apple" ] ; then
+		while [ -z "`lsof -iTCP -sTCP:LISTEN -P -n | grep -- ':${SAI_LIST_PORT}'`" ] ; do
+			sleep 0.5
+		done
+	else
+		while [ -z "`netstat -ltn4 | grep LISTEN | tr -s ' ' | grep ":${SAI_LIST_PORT}\ "`" ] ; do
+			sleep 0.5
+		done
+	fi
 
 	sleep 1
 fi