Illustrator 24.0.1 slow performance on macOS Mojave 10.14.5

Is the Dictation service turned off in your system?

Hi there,

Sorry to hear about the trouble you are facing with Illustrator. I would request if you can share a few more details like:

1. Is this happening on a specific file or on all files?
2. Where are the files saved, locally or any network or shared drive?
3. If this issue is not on a specific file, you can also try resetting the preferences and see if that helps:

• Close Illustrator.
• Click on the Finder icon on the dock, choose Go on the top> Go To Folder.
• In the Go To Folder dialog box, type "~/Library". Click Go.
• Open the Preferences Folder > rename the Illustrator  24 Settings folder to Illustrator  24 Settings folder.old
• Under Preferences, Open Adobe folder and rename Adobe Illustrator folder to Adobe Illustrator.old
• Go back to library->open caches->rename  com.adobe.illustrator to com.adobe.illustrator.old
• Go back to library->open application support-> open adobe->rename the Illustrator  24 folder to Illustrator  24 folder.old

Disclaimer: Please note that resetting preferences will remove all the custom settings and Illustrator will launch with default settings. This way all your old settings will be saved in .old folders and Illustrator will recreate new folders with default settings.  

Regards

Rishabh