Adobe Camera RAW High CPU While Idle on macOS

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  • Problem
  • Updated 10 months ago
With ACR in Photoshop CS6 for macOS, CPU use only spiked while making a change. You could sit there and think about the image before your next adjustment and the CPU would idle normally.

With ACR in Photoshop CC the CPU spikes to 200% and stays there even if you're doing nothing. It will calm down a couple seconds after switching to another application, but then will spike again when you switch back.

I like to make my initial changes and then take a moment to study the image before deciding what tweaks I want to make. If I do that with Photoshop CC my MBP fans spike to 6,200 rpm while ACR wastes CPU cycles...and battery power if I'm working remotely...doing absolutely nothing. Sampling the process in Activity Monitor leads me to believe there's a run away timer that's firing constantly.

This bug has survived several updates and I'm ready to cancel my CC subscription and go back to CS6 over it. Any suggestions? Any chance this will be fixed?
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Daniel Taylor

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Posted 10 months ago

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Photo of Rosa


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I have the same problem but only when I use ACR through Adobe Bridge. When using ACR through Adobe Bridge the CPU spikes up, the CPU, Memory and Power uses are all in the red and I have to quit Bridge. I have Windows PC, latest update, current version of drivers with 32GB ram.
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Peter Moloney

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Same as Rosa... only MacPro 10.12.6
Bridge seems to eat up CPU power to a point where sometimes Photoshop healing brush lags.
Any advice gratefully accepted!