I can't close a "verifying" core services UI agent window.

I have a little core services UI agent window, shown in the picture below, which is stuck, and which I can't close. Clicking on the 'X' to cancel doesn't do anything. Command-Option-Escape to force quit, doesn't show the window among the possibilities.


Is there a way to close this, without having to reboot my system?

MacBook Air 13″, macOS 12.6

Posted on Sep 20, 2022 2:54 AM

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11 replies

Sep 20, 2022 4:36 AM in response to ijcos

To my eyes as per the supplied image above indications a Microsoft Presentation File " .pptx " is being moved from its' present destination to a location on the Drive itself.


Until the file has been completed copied to the destination location the UI will continue to appear.


If the file ( .pptx) files is too Big for the Local Destination ( ( Internal Drive ) to handle ? Given enough time, an Error Message should eventual be presented indicating what the problem might be.

Sep 20, 2022 3:02 AM in response to Owl-53

Thanks. Only Option 2 works, since the CoreServicesUIAgent process does not show in the "Force Quit Applications" window.


If I force quit CoreServicesUIAgent via Activity Monitor, will it restart automatically when another app needs to be verified? I don't want to turn off app verification altogether.

Sep 20, 2022 1:30 PM in response to ijcos

We do not know if the User has read all the details regarding the Conversation of files to other file formats in Keynote


Nor do we know if the User has read the details on the File Formats compatible with Keynote.


Nor do we know if the current version. of Keynote installed on this computer is totally up-to-date



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I can't close a "verifying" core services UI agent window.

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