Still over 100% CPU Usage . . . HELP

J

JohnH36

Junior Member
There is ONE business application that I need to use Windows for - that is the reason I bought and installed Parallels and Windows 10 on my Mac. I had a 2016 12" MacBook Pro, and Parallels and Windows was devouring resources and running fans on high, so I upgraded hoping to stop this . . .
Current configuration:
New 16" MacBook Pro Mac OSX Catalina 10.15.3
2.3 Ghz 8 core i9
32GB Memory
2TB HD

Parallels Configuration options - upgraded to parallels 15.1.2
Processor allowance - 2 as per recommendation (although I had it set to 4 with no difference)
16 GB of Memory allocated within recommendation
Graphics memory is set to auto

The posting on the website says this could be caused by an "underpowered machine" and I thought perhaps that was the case, so therefore the new Mac, that by any stretch of the imagination is far from underpowered. So what else can I do?

Processor usage is still over 100% (between 105 and 150 percent) every time I boot up parallels and windows according to activity monitor, and fans rev up immediately to start cooling the processor.
 
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Hmm - I thought this had worked for me, and I successfully upgraded to Win 11 Pro 24H2 using the instructions above, and initially all was well. The fans weren't going crazy, and CPU usage was low/normal. However, after a reboot or two it also installed the July Cumulative updates - and once again the fans started going again and haven't stopped since.

So the answer seems to be, upgrade to 24H2, and while doing so make damn sure to pause all updates - as once the July cumulative update installs, these chips seem to have a problem.
 
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PaulM53 said:
So, I reached out to Parallels support and they had me do this - and it worked :)

Thank you Vashish!

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We would recommend you to update your current Windows 11 virtual machine to 24H2 and test if the issue still persists.

First, ensure that you back up your Windows virtual machine before proceeding with the steps outlined as per this KB article : https://kb.parallels.com/en/4859 or https://kb.parallels.com/8827
1. Download the .ISO image file from Microsoft website : https://www.microsoft.com/en-us/software-download/windows11arm64
2. After successfully downloading the Windows .ISO image file, start your Windows 11 virtual machine and mount the Windows installation .ISO file inside it, following the instructions in this KB article : https://kb.parallels.com/8638
3. Once you have successfully mounted the Windows installation image file inside your Windows 11 virtual machine, you will need to run the setup file located within the image in the "In this PC" Window.
4. Press Command + E on your keyboard to open the "Quick Access" File Explorer window, then select "DVD Drive" from the left pane.
5. Double-click the "Setup" file to begin the upgrade to 24H2.
Click to expand...
Thanks for sharing this solution. Worked for me. Seems that some of the recent updates of windows 23H2 have messed things up.
 
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