High GPU load on macOS 26 Tahoe
Laggy performance and high GPU load.
Upon investigation, issue isolated to WindowServer when Adobe Illustrator is running, with or without a document open.
T Y Zheng
shared this idea
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Joost Egelie
commented
When Illustrator is hidden, GPU load drops immediately (iMac M3, only since Tahoe 26.2 was installed).
By the way, Illustrator gets the fans running top-speed on an Intel iMac with Ventura too.
For both computers, there are no significant steps to reproduce the problem; the GPU load seems to shoot up randomly, pertaining until Illustrator is closed, or until minutes of inactivity pass, or when Illustrator is hidden.
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Nawneet Kumar
commented
@T Y Zheng, Apologies for the issue you're facing.
Could you please share steps which leads to this high GPU load? Any short video with steps would really help to understand the problem.