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Mac is overheating when running Windows virtual machine

APPLIES TO:
  • Parallels Desktop for Mac Home Edition
  • Parallels Desktop for Mac Pro Edition

Symptoms

  • Mac is overheating when running Windows virtual machine

  • High CPU usage by virtual machine process in Mac Activity Monitor:

  • Reasonable or low CPU usage by the Windows processes in the Windows Task Manager:

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Cause

Parallels power plan issues.

Resolution

Reinstall Parallels power plan:

  1. Uninstall Parallels Tools:

    • Right-click on Start button > Control Panel > Apps and Features and remove Parallels Tools if present.

    • Reboot virtual machine.
  2. Delete Parallels power plan:

    • Open Power Options by right-clicking Start > Control Panel > System and Security > Power Options.

    • Make a different plan the active plan, e.g. Power Saver.

    • Under Parallels plan, click Change plan settings.

    • On the Change settings for the plan: Parallels page, click Delete this plan.

    • When prompted, click OK.
  3. Restart virtual machine and install Parallels Tools.



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