QuickLookUIService Freezing and Finder-Related Apps Not Responding After macOS 15.3 Update

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Level 1

12 points

QuickLookUIService Freezing and Finder-Related Apps Not Responding After macOS 15.3 Update

I’ve recently updated my MacBook to macOS Sequoia 15.3, and since then, I’ve been experiencing persistent issues with QuickLookUIService and Finder-related apps. Here’s what’s happening:

1. Quick Look Freezing:

• When I press the spacebar to preview files (Quick Look), the preview either doesn’t load or causes the system to freeze.

• I frequently get an error message saying that QuickLookUIService is not responding, and I have to force quit it using Activity Monitor or CleanMyMac.

2. Finder-Related Apps Affected:

• Apps like HoudahSpot and TextSniper, which rely on Finder or Quick Look functionality, also stop working and become unresponsive immediately after launch.

Has anyone else encountered similar issues after updating to macOS 15.3? If so, are there any workarounds or fixes you’ve found?

Thank you in advance.

MacBook Pro 16″, macOS 15.3

Posted on Feb 10, 2025 12:39 AM

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Answer 1

Owl-53

Level 10

102,553 points

Feb 10, 2025 2:32 AM in response to Vernon Kong

Part 1 of 2

@ Vernon Kong wrote " Activity Monitor or CleanMyMac. "

Certain 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 Application may do to the computer is up to the User to check this out before purchase

Any of the below should be removed as per Developers Instructions

Disk Cleaner

CleanMyMac , aka “ BrickMyMac “

Part 2 of 2

Specific to CleanMyMac aka “ BrickMyMac “

To put the CleanMyMac in context and the damages it may have or has already done.

This application can or will Muck Up your User Account ( Home Folder ) of this machine.

It does not touch the Operating System itself unless you consider your User Account ( Home Folder ) as part of the Operating System

Then in that specific context - it has Mucked Up the Operating System

In which case, the Operating System is hosed

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Answer 2

Yer_Man

Level 10

165,912 points

Feb 10, 2025 3:05 AM in response to Vernon Kong

It's not a common issue and my first step would be to rid myself go Clean My Mac

Standard warning:

Never install any app that claims to “clean up”, “tune up” or “speed up” your Mac. These apps exist for one reason: to extract money from the wallets of the inexperienced user. What they do can be done in other ways, and mostly what they do is unnecessary, but sounds good. Unfortunately in the hands of an inexperienced user they can do a lot of damage to a Mac OS installation. Avoid.

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