Dalla pagina man di pmset :
POWER SOURCE ARGUMENTS
-gwith a 'batt' or 'ps' argument will show the state of all attached power sources.[…] Certain Apple battery calibration tools may temporarily disable battery charging, even though your Apple portable is plugged into AC power.
Such tools will never surprise you with this behavior; you will know it's happening. This state will be reflected in an additional line of output to 'batt' or 'ps' readings, including the
pidof the app inducing this behavior.'ChargeInhibit': 1432
Quindi, esiste qualche pezzo di software disponibile pubblicamente per forzare la batteria a non caricarsi?