Hello, I just purchased a CyberPower 825VA UPS from BestBuy and connected it to my iMac via the included USB cable. The computer recognizes it and says that is is 100% charges, but the menu bar says "Unknown Time" when I switch the preference to see how much time is remaining. Edit : Nevermind, it doesn't show anything until the power is cut. Is this normal or did I miss something setting it up? Thanks.