@grynspan Yeah. Then the next question is why the CyberPower is 1/4 the price of APC. There's got to be a catch.
@grynspan But I figure it must be more complicated than that or I would have seen way more written about this problem before.
@grynspan What I've read (esp. for Dell XPS but also Macs) is that certain power supplies will instantly shut off with approx sine.
@grynspan I've seen mixed reports saying that newer iMacs, Mac Pros, and Mac minis don't work properly with approximated sine wave power.
Wondering what the truth is regarding pure sine wave UPSs and Macs.