iMac 27" 5K high temp

Hi there, chrispl0.

I see that you're concerned about the temperature level of the CPUs in your new iMac. I'm happy to help.

See how apps affect Mac performance, battery runtime, temperature, and fan activity -- I don't believe that the application you're using is reporting the correct temperature as 92 degrees Celsius would be 197.6 degrees Fahrenheit. This article provides good information and steps you can take when you believe there's an issue with the CPU.

How to use Activity Monitor on your Mac -- You can also use Activity Monitor to check the overall Energy usage as well. 

Let me know how that goes, and take care!

Can someone, tell me what to do. Accept it or...

use a sensor based algorithm like MacFanControl, to gradually increase the fan speed before the temp's get so high.

https://www.crystalidea.com/macs-fan-control

FWIW, some folks here frown on using a fan control. However IMHO, keeping the GPU and PECI temp's in check, far out ways any notions of premature fan ware.

FWIW. yes, 92°C would be very high. I don't have InDesign but assuming it's the current version it shouldn't be raising the temp that high. My 5K iMac runs on average approximately @ 49°C to 55°C according to iStat Menus with several apps running. As suggested, you should check activity Monitor for any runaway apps.

Yes I see the high temps. Monitoring them is one thing, Controlling them is a totally different thing.

What is your fan speed when the PECI is in the 50 to 60C range?

What is your fan speed when the PECI is in the 70 to 80C range?

What I'm suggesting, uses the fan control algorithm to start increasing the fan speed at a known value (say 60C), then continue increasing the fan speed until a suitable balance of fan speed and temperature control (say only 80C) is reached.

What were you using before the iMac? If this is your first All-In-One system, then keep in mind that they are packed into a very tight space with inadequate cooling in comparison to an old Mac Pro or PC tower.

Hi, chrispl0 !

There are a couple of things you can do to make sure your Mac is cooling itself in proper fashion. First, take it to an Apple Store or Apple Authorized Service Provider and have the Cooling System diagnostic performed. It should take 20-30 minutes for the diagnostic. This is the only official way to know if your iMac is - pardon the pun - hot or not.

Second, make sure all the ventilation slots on the iMac are free of lint, dust and debris. There are vents on the back of the iMac as well as along the bottom of the display. A soft microfiber cloth or a static-free brush should help loosen and remove any blockages. Compressed air is not recommended as one does not want to drive any lint, dust or debris into the iMac.

Good luck !

I believe two, and now three contributors mentioned that is a very high temp. I managed to get my CPU up to 70°C by streaming a 4K Video while I was running other apps.

You're welcome.