Chapter in this post:
The UPS, i.e. the uninterruptible power supply, is used on the Mac and iMac to prevent damage to the computer in the event of a power failure. Because unlike a backup power supply (emergency power system), there is no interruption in the transition from the power grid to the alternative supply.
A UPS can protect the Apple computer from hardware and software damage both at home and in the company, as all projects and open files can be saved and the computer can be shut down in the event of an interruption in the power supply. Of course, this also applies to Windows PCs and other technical devices. Here you can find out which UPS models and manufacturers are suitable.
The topic was recently raised by a reader of this blog with her question:
In our small town, power outages have been increasing lately. My iMac (Retina 4K, 21,5 inches, end of 2015) unfortunately suffered damage on July 1st, so I had to completely rebuild it over the weekend. At the same time refreshed on Catalina. Can you recommend a UPS for the iMac? It has an HHD and the many power outages are not so healthy.
The question is not answered that quickly and easily, because there are UPS devices that in theory work with an iMac. However, some of the software that goes with it is out of date and therefore not compatible with current macOS versions such as Catalina. And others have no idea how long they can keep an iMac alive. After all, the 21,5-inch iMac consumes up to 120 watts under load. How many minutes can a UPS device deliver so that you have time to save everything and shut down the computer completely?
In addition to the runtime in the event of a power failure, there are other questions. For example, some devices offer a USB port. Here you have to look carefully whether it is able to give the connected device (Apple Mac, Windows PC, NAS, server, etc.) the signal to shut down. Some cheap UPSs are just a simple USB charging port. Other quality features are replaceable batteries, standby power consumption, the availability of software for 64-bit macOS systems and, if necessary, ensuring a pure sine wave (if the end device requires it). Those who can do without the software should be able to recognize the power failure themselves.
A few of the UPS devices available on the market can be compared on the basis of some of the features shown. For the comparison here, after some research, I chose the manufacturers Legrand (model 310081) and CyberPower (model UT700EG). If you know a better device for the uninterruptible power supply on the computer, please leave a comment.
|Legrand 310081||CyberPower UT700EG|
|Volt amperes||600 VA||700 VA|
|Watt||360 W||400 W|
|Energy consumption with charged battery (standby)||approx. 10 to 11,5 watts||approx. 2,5 to 2,8 watts|
|Schuko connections||6 (including 4 with overvoltage protection)||3|
|USB port||1 x USB-A (charging port)||USB B 2.0|
|Ethernet connections||none||1 x in, 1 x out|
|OS compatibility||n / a||Windows 10/7 / Server 2013/2012/2008, Linux|
|Additional||Designed to be bridged for 15 minutes, output voltage at 230 V.||Overvoltage and lightning protection, LED status display, automatic voltage regulation (165 V, 230 V, 290 V)|
|Price||95,59 Euros||63,10 Euros|
After the internal batteries of the UPS are charged, the device also consumes some when the power is passed through for the connected devices. As shown above, the manufacturer CyberPower's consumption is rather low, while Legrand has a higher demand. The Legrand model consumes an average of four times as much as that of CyberPower. Of course, this also results in costs that are four times as high, even if they are “only” in the one to two-digit euro range for a certain period of time. All in all, CyberPower delivers the better overall offer at a lower price.
When I was looking for a UPS device for computers, especially for the Apple iMac, I came across other CyberPower products. Especially in one Forum thread the (successfully tested) use of the manufacturer's models was described. Those of the SineWave series deliver a pure sine wave, among other advantages. It was also reported that the connected Apple computers were automatically shut down - but an earlier version of macOS (10.13 High Sierra) was in use.
Other UPSs offered by CyberPower that can be recommended are therefore the following:
If you have a different or better UPS device in use and can recommend it for the Apple iMac, iMac Pro, Mac Pro, Mac mini and other computers, please leave a comment. I look forward to your testimonials :)
Jens has been running the blog since 2012. He appears as Sir Apfelot for his readers and helps them with problems of a technical nature. In his free time he drives electric unicycles, takes photos (preferably with his iPhone, of course), climbs around in the Hessian mountains or hikes with the family. His articles deal with Apple products, news from the world of drones or solutions for current bugs.