QuickLook Bug & Memory Leak

If as has been suggested by my colleague @Barney-15

There is some Third Party Software ( outside of Logitech ) that has Mucked Up the system, which I tend to agree with

Reinstalling the OS over the Top of the Existing installation will do nothing but consume your time

If one does the Erase All Contents and Setting and stop there - full stop

That would be a good indicator just where it issue really is

Or if you are inclined

To avoid a session of Q&A, Q&A  and Q&A  

Download the Application Etrecheck  ( External Link ) directly from the Developer.

This is a Diagnostic Tool that makes no changes to the computer.

It makes a coherent and readable inventory of both the Hardware and Software used on the computer 

The application is free or paid for added features. 

The Report will Not Reveal Any Personal Information. 

Post back the Full Report - Share Report >> Copy , then  paste  >>>> using the Additional Text Icon  <<<<

mikes1025 wrote:

I have just discovered a bug that occurs when I scroll through many files in Finder while QuickLook active. It starts off normal then after 10 or so scrolls using my directional keypad the window would freeze along with the app. Then minutes later the system would be very laggy. Here's a sample of what my Activity Monitor showed during this time

This is pretty bad. It happens after I reset my laptop. Not sure what to do here besides not use QuickLook anymore

MacBook Air 15″

Not seeing the issue.

What does that mean "after I reset my laptop"...?

Always meaningful to state the exact Mac(?) intel/M-series...

and exact macOS...

verify your software is up to date—

The current stable release of Tahoe including bug fixes, security updates is macOS 26.0.1

Keep your Mac up to date - Apple Support

Keep your Mac up to date - Apple Support

To be proactive you can file a bug report / submit your Apple Feedback here: Product Feedback - Apple

To trouble shoot further you can:

—A SafeBoot Start up your Mac in safe mode - Apple Support will sort many anomalies

Does a quick disk repair before it fully boots up, and certain system caches get cleared and rebuilt, third party system modifications and system accelerations are disabled temporarily.

Login and test. Reboot as normal and test. Caches get rebuilt automatically.

This test will tell you if third party interference; most extensions etc are not loaded in safe boot mode.

—Test issue in another user (or guest user) account Change Users & Groups settings on Mac - Apple Support

This will tell you if it a universal issue or isolated to your user/admin account. 

***wireless keyboard with rechargeable batteries— connect the charging cable, this will make the wired keyboard successful Safe Boot your Mac.

unplug all non-essential peripherals when testing

Uninstall all third party apps that are Cleaners/Optimizers/VPN/Anti-Virus

all known to cause issues on the macOS

no insight or resolve —

you can try reinstalling the macOS on top of your existing macOS to sort upgrade issues:

'

How to reinstall macOS Recovery (both M1/M2/M3/M4 and Intel) — How to reinstall macOS - Apple Support

I just QuickLooked through my entire Recents Smart Folder and nothing on the Memory page changed much at all. No freezing or lags here.

As noted previously, there is something quite odd going on with your Mac. You are showing zero actual RAM and 50+GB of swap. My guess would be some third-party system modification is mucking up your Mac. I can't really see anything that would do so from your Activity Monitor screen. Logitech's drivers have always lagged behind macOS upgrades and will usually cause problems until they get around to updating them. However, I can't see them causing this issue. If you are using a Logitech keyboard and using that to move through files, that could be it.

Some of the Over Arching issues have been addressed in your other question

How can I reduce memory pressure on my Ma… - Apple Community

I would suggest shutting down the computer then start up normally again

This should release the Finder using 2.72 GB, WindowServer using 1.11 GB, Netflix.com from using 1.01 GB, Spotify Helper using 364.6 MB and QuickLookUIService using 149.5 MB

As for a Memory Leakage in QuickLookUIService - what exactly does the user believe constitutes QuicklookUIService has a memory leak

Though, I maybe overlooking something here

But something seems odd from your image

Most everything is being measure in MB or GB in some cases

The Memory Pressure is in RED ( Maxed out )

But all the other values, like Physical Memory which is zero is measured in Bytes

With the Swap Using 51.53 measured as GB

From the little I know

When the Physical Memory is ALL used up, the System maybe pushed using a Swap File as Temporary RAM

mikes1025 wrote:

reinstallation of OS didn't help. I think I'll have to take it in for service

Having the computer serviced by the Apple Genius Bar or by an AARP maybe is a good idea

Though be also aware they may check the Hardware and or at your specific request to do a Remove all Content and Setting which has already been suggested by self 🦉-53

What was suggested is what we sometimes call Do It Yourself

I have started reinstallation of Tahoe. Hopefully this will wipe away

The OS is mounted read only from a sealed snapshot. It cannot get modified or even corrupted. The initial installation could somehow be bad, but not common. All of the third-party modifications happen outside the OS. A reinstall could possibly solve a problem if it was a bad install, but otherwise will be fruitless.

You are welcome

In regards to Etrecheck application

I personally us this application on all 3 different Apple Silicon Computer

Like to keep an eye on some of the inner working from time to time