keynote

Greetings, alexzanoil!

Thanks for reaching out to the Apple Support Communities! It sounds like you're having an issue updating Keynote on your Mac. Check out this article If you can’t download or update apps on your iPhone or other Apple device for some steps you can take.

I also recommend taking a look at this article with steps to follow to Use safe mode to isolate issues with your Mac. This will perform checks and stop certain software from starting up automatically. Once you are in safe mode, test to see if you have the same issue.

Also, check out this article with steps for How to test an issue in another user account on your Mac to create a new user and test the issue in the new account to see if the issue is user specific or system wide. 

Let me know the results and have a wonderful day!