Thank you for this post! I thought I was the only one who experienced this issue since upgrading to Monterey.
My situation is a little different as I did not use Sidecar. It happens to a few applications already:
- Microsoft Word and Excel. Now, I can't even use 'Save as' because the file dialog never pop up and I cannot save a file to another format. This is really annoying.
- Scrivener - This is a writing app that I used and similar behaviour too - whenever I tried to use a function that will normally pop up a file dialog, it does not do anything! I spent many hours trying to re-install things and I don't even know what fixes it. This problem comes and goes.
- Chrome - If this happens, whenever I tried to download something from Chrome, it will reach 100% but never complete the download because it has problem trying to open the file dialog to prompt me where to save the file.
As these applications are not related - at least not from the same providers, I suspect this must be some underlying OS API (which these apps invoke), such as open a file dialog, that is not working properly.
I have been having this problem intermittently, and when this problem arises, I don't know what I did to fix it because there are so many things that I did (including waiting for a few hours after trying many things that didn't work).
I am using Macbook Pro 16 (Intel) with at least one external monitor attached.
Any advice would be much appreciated.
p.s. At the moment, I have the following works and not working:
MS Excel - Save As (Not working) - However, if I make Mac the main display, then it works! Puzzling!
MS Word - Save a copy (Works!)
Scrivener - Save (Works!)
Chrome - Download (Works!)
I have two occasions where none of the above works.