problem with QSTD5304 DVR recorder: can't see the camera

problem with QSTD5304 DVR recorder: can't see the camera

 

I have a QSTD5304 DVR recorder with 4 cameras. It has mics as well and 7 inch built in screen. I have ran the soft were on this macos,and still cannot see the cameras on this computer,,,o it is attached to a LINKSYS ROUTER AND THE IP ADRESS IS ALL DONE AND PUT IN THE DVR AND ROUTER ADDRESS..WHAT AM I DOING WRONG.....HELP I AM LOSING IT....