Mac OS X 10.11 “El Capitan” support Installer is now compliant with SIP (aka “rootless”) requirements. apcupsd executables are installed into /usr/local/sbin instead of /sbin. Config files and scripts remain in /etc. NB: There continues to be a known issue with USB UPSes under OS X where the OS power management service occasionally does not relinquish control of the UPS, leaving apcupsd unable to