./start command not working

I recently started using CQ on mac , I have difficulties on very basic thing : running CQ from terminal 

I tried following command , nothing happens . No Additional information on logs.

./start -d --debug-port 8001  or ./start

--start.bat file JVM parameters

CQ_JVM_OPTS='-server -Xmx1024m -XX:MaxPermSize=256M -Djava.awt.headless=true -Djava.compiler=NONE -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=8001 -jar cq5-author-4502.jar -nofork'     

When I used 

./quickstart -d --debug-port 8001

--quickstart.bat file JVM parameters

CQ_JVM_OPTS='-server -Xmx1024m -XX:MaxPermSize=256M -agentlib:jdwp=transport=dt_socket,address=8001,server=y,suspend=n'   --quickstart 

 it works. 

I am trying to Run CQ in debug mode .

What am I missing in here ?