'cursoruiviewservice' Not Responding and Causing Lag on MacBook Air

If you're shutting down or frequently restarting your computer, it now makes more sense why you're not experiencing these issues. I never shut it down. 5 hours isn't sufficient time to properly test it. Can I ask which browser you use?

Are you saying that it's not Apple's responsibility if the 3rd party app I downloaded from the App Store causes a system error that prevents me from writing in Apple Pages or Safari? Am I understanding this correctly? If I were to download a third-party app from the App Store and, as a result, Safari wouldn't open, would that be considered normal? By the way, the developer of the 3rd party app in question is Microsoft.

Carefully read the 'How to contact an app developer' article in the link you sent, look at what it says there:

When to contact an app developer for help

If an app isn't working, but the issue doesn't affect other apps.

The links and explanations you sent have nothing to do with our topic. On this forum alone, 75 people have said 'me too,' and there are 35 replies. There's a serious lag occurring on the computers.

Users who aren't experiencing lag or 'not responding' issues having a simple `CursorUIViewService` process taking up 1.5 GB is already not normal in itself.

It looks like there’s a misunderstanding. Simply having an app on the App Store does not mean Apple automatically takes a cut. For free apps, like many on the store, Apple doesn’t take any percentage. Apple only charges a fee on paid apps or in-app purchases.

The claim that being on the App Store only means Apple takes a percentage is completely incorrect.

Developers use the App Store for more than just revenue sharing, it offers better security with sandboxing, trusted app distribution, and broader access to users. It’s about providing a secure and convenient experience, not just revenue.

Please don't confuse the users.

PRP_53 wrote:

Certain Third Party Applications maybe available on the Apple Apps Store - this only means the Developer is prepared to pay Apple a percentage on each sale. 

What the Third Party Application may do to the computer is up to the User to check this out before purchase.

Is the status of the process showing as "not responding"?

I have reported the issue to Apple Support. I think their engineers will review it and get back to me in 1-2 weeks. I will keep you informed as well. Which programs do you use the most?

Yes, all these issues began after installing Sonoma. I will update you with Apple Support's response when I receive it this week. Thank you for your help.