Local construction will be causing power outages to my house for a significant length of time. I have been using a cyberpower 1000 and until today have not bothered to connect via USB. Now it's connected via USB to my late 2012 iMac and I was anticipating the need to install cyberpower software to enable the auto shut down process. Shutdown occurs at a set time once the power source switches to ups battery after a power outage. I was impressed to discover OSX provides control settings for ups devices. No need for extra software. With which version did OSX have native ups functionality. Definitely a convenient package contained within OSX.