Finder Apps and Adobe Bridge no longer open Adobe Illustrator
Something changed with the last update that altered the default association between Illustrator files and the application. I first noticed it when my barcode app failed to launch Illustrator upon export—something that had been working perfectly for years. Then, I encountered the same issue in Adobe Bridge: every time I double-click a .ai file, it simply won’t open.
After investigating, I discovered that the default file association for .ai files had been changed to something called IllustratorDiagnosys (see screenshot). Manually changing this back to Adobe Illustrator within Bridge resolved the issue inside that app, but external applications and links are still not functioning as expected.
Additionally, resetting Bridge to its default settings restores all .ai file associations to IllustratorDiagnosys 29.3.1.
It seems that something in the file association preferences was modified, not just affecting Bridge, but the entire system.
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Carlos Morales Quirós commented
Everything in my MacOS computer is updated to the latest version, system, creative cloud apps, etc...
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Something changed with the last update that altered the default association between Illustrator files and the application. I first noticed it when my barcode app failed to launch Illustrator upon export—something that had been working perfectly for years. Then, I encountered the same issue in Adobe Bridge: every time I double-click a .ai file, it simply won’t open.
After investigating, I discovered that the default file association for .ai files had been changed to something called IllustratorDiagnosys (see screenshot). Manually changing this back to Adobe Illustrator within Bridge resolved the issue inside that app, but external applications and links are still not functioning as expected.
Additionally, resetting Bridge to its default settings restores all .ai file associations to IllustratorDiagnosys 29.3.1.
It seems that something in the file association preferences was modified, not just affecting Bridge, but the entire system.