Repeat the steps with the problematic app.

Select the process and click the x icon.

Type in CoreServicesUIAgent on the search bar.

Click View > All Processes from the top-left menu bar.

Open Activity Monitor from the Applications folder in Finder.

Some of the common messages you may receive include:

The CoreServicesUIAgent issue can occur with any third-party apps that need to be verified on Mac. What to do when CoreServicesUIAgent won't close on Mac? You can also find it in Activity Monitor or by navigating to /System/Library/CoreServices/CoreServicesUIAgent.app/Contents/MacOS/CoreServicesUIAgent. This way, it reduces the risk of installing malicious software on Mac.ĬoreServicesUIAgent is the GUI agent used by Mac to inform users that an app is being verified. When you install an app or update an app downloaded from the internet, Mac's built-in anti-malware feature Gatekeeper will verify whether the app is from an identified developer and the code is not modified. FAQ about verifying Microsoft Outlook stuck on Mac Guide to CoreServicesUIAgent won't go away: If you wonder what CoreServicesUIAgent is and how to close CoreServicesUIAgent on Mac, this post has got you covered. You can minimize the window when you do it, its icon on the Dock reads CoreServicesUIAgent.īut the issue is that CoreServicesUIAgent won't close, and it seems to be stuck on verifying the app.

You may find a verifying window like 'Verifying Microsoft Outlook' pops up when installing an app downloaded from outside of the Mac App Store, after updating applications on Mac, or while surfing the internet. Fix CoreServicesUIAgent Verifying Stuck on Mac & Won't Close

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