In version 30.5.1, Illustrator stopped writing color settings to ACEConfigCache2.lst, the file used for color settings synchronization.
Photoshop, Illustrator, InDesign, Acrobat, and Bridge use ~/Library/Preferences/Adobe/Color/ACEConfigCache2.lst to store and synchronize their active color settings preset names.
Up through Illustrator 30.5, Illustrator correctly wrote its own color settings information to this file. However, starting with version 30.5.1, it not only stops writing its color settings entry, but also removes the Illustrator 2026 entry from the file entirely.
Illustrator 30.5.1 still appears to read color settings written by Bridge and can apply the corresponding preset correctly. However, given that it no longer maintains its own entry in ACEConfigCache2.lst, I would like to ask whether this behavior is intentional or if it is a defect.
macOS Tahoe 26.5
Illustrator 2026（30.5.1）
Yamonov
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