I used to have a desktop PC that I used with an APC UPS. When I got a MBP, which I usually use as a desktop with a separate monitor, keyboard, and mouse, I continued to use the UPS even though the software for the system was not Mac compatible. I plugged the Mac power supple, the monitor, external HD back up, and a lamp into the UPS and a several other things--speakers, USB hub, etc, into the surge protect only side. A couple of times when the power went out, the system powered up and I shut things down properly. Now the UPS has died. If I replace it, it will be with a new unit. My question--do I really need to replace it at about $70? The MBP will switch to internal power on its own, so the only critical item is the HD back up on which I run Time Machine and CCC, and which would go down with a lurch. Is that really likely to cause a problem. Looking for some advice. Thanks.
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