Hi @ds76421298,
Sorry to hear about the trouble you are facing. I agree with @Monika Gause. This generally happens when the third-party application is interfering with Illustrator or system I/O. In that case, you may try running the app in Safe Mode (Mac) and launch Illustrator only. Then, open/ create a new document and follow your usual workflow. In Safe Mode, your system starts to perform certain checks and prevent third-party software/ services from automatically loading or opening. If it works fine in Safe Mode, then open other apps one by one, which you usually open, and see which app is conflicting with Illustrator. You can check and find the culprit app/ process/ plugin/ extension with the help of Activity Monitor, and then you'll have to close them whenever you face such issues. This is something that cannot be easily fixed as I/O is controlled by macOS and blocked by other apps, which is out of our control.
In some instances (just an observation), I have seen launching Illustrator before any other apps help in scenarios like this. Feels like macOS is giving I/O control on a first come and first basis.
Also, it can happen due to corrupt preferences. In that case, you may try resetting them.
I hope it helps!
Regards,
Anshul Saini