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1. CEPHtmlEngine keeps macOS awake

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   7 comments  ·  Illustrator (Desktop) Bugs » Performance  ·  Delete…  ·  Admin →
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   Under Review  ·  AdminEgor Chistyakov (Admin, Adobe Illustrator) responded

   The issue is being tracked and is awaiting the fix by CEP team

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   Chris Woodfield commented  ·  Jan 2, 2026  ·  Edit…  ·  Delete…

   This still appears to be an issue running Illustrator 30.1 on MacOS Tahoe 26.1 Display does auto-lock and the OS doesn't go to sleep unless I close the laptop lid.

   Interestingly, looking at Activity Monitor now, I see that it's the main Adobe Illustrator process that has the Preventing Sleep flag, while the CEPHTMLEngine and related processes do not (see screenshots). This is different from what I observed when first troubleshooting this.

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   Chris Woodfield supported this idea  ·  Jan 2, 2026