Plex on OSX often falls into a tight loop and consumes %100 of the CPU. This watchdog is to restart Plex to avoid running the CPU hot for an extended period of time.

plex_watchdog.sh

#!/bin/sh

PLEX_APP='/Applications/Plex Home Theater.app/Contents/MacOS/Plex Home Theater'
COUNT=0
PLEX_CPU=0

LOOP=1
while [ $LOOP -le 14 ] ; do

	PLEX_CPU=`ps aux | grep "$PLEX_APP" | awk '{print $3}' | head -n 1`
	PLEX_CPU=`osascript -e "round($PLEX_CPU)"`
        #echo $PLEX_CPU
	if [ $PLEX_CPU -gt 95 ]; then
		echo Value of count is: $COUNT
		let COUNT=COUNT+1
	fi

	if [ $COUNT -gt 12 ]; then
		#echo Must kill Plex: $COUNT
		PLEX_PID=`ps aux | grep "$PLEX_APP" | awk '{print $2}' | head -n 1`
	        kill -9 $PLEX_PID > /dev/null 2>&1
		sleep 10
		"$PLEX_APP" > /dev/null 2>&1 &
		COUNT=0
	fi
	sleep 4

	LOOP=`expr $LOOP + 1`
done

restart_plex.sh

#!/bin/sh

PLEX_APP='/Applications/Plex Home Theater.app/Contents/MacOS/Plex Home Theater'

PLEX_PID=`ps aux | grep "$PLEX_APP" | awk '{print $2}' | head -n 1`
kill -9 $PLEX_PID > /dev/null 2>&1
sleep 10
"$PLEX_APP" > /dev/null 2>&1 &