sep client status is updated at client end while at SEPM console it's showing disabled

Hi All,

In my environment, MAC machine(with OSX10.8,10.9 & 10.10) installed with SEP clients are not reporting to SEPM console properly. When we checked at user end by taking remote of the machine found that the SEP client is up-to-date. But when we check the same machine at SEPM console, it's av status found as disabled(in computer statuslogs) & shows as No Status reported. What could be the reason.

Please suggest.