UPS and our iMac // Will not allow iMac to sleep.
Hello,
We have a Cyberpower UPS (CP685AVR) for our 20" iMac 2.66Ghz (last gen)and it works great. It has a USB interface to communicate with the iMac's power manager, and tells me how much juice is left, how the cells are doing, etc.
The only problem is the UPS will not allow the iMac to sleep; if I try to manually put it to sleep, it will wake again in 10-15sec. If I disconnect the UPS, the iMac works just fine. There are no third-party drivers, either. Cyberpower relies on Apple's built-in UPS support. I've been leaving the USB cable unplugged but would like like to use it if possible.
Has anyone had an issue like this, and what has been your experience? Thanks.
I won't buy Cyberpower anymore since I had one burn up on me so I have not had any experience with their newer models. I have 2 APC's and they work fine with the built in Energy Saver settings.
Are you connecting the USB directly to the back? I'm not sure if it will help but you might try resetting the SMC: http://support.apple.com/kb/HT1543?viewlocale=en_US
George
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