Quicklook isn't working after Monterey update

FWIW, As I posted above, I have four installs of Monterey, three on Intel Macs and one M1 Mac. None have the problem so it appears it is a local problem. In your specific case, CleanMyMac X may have caused damage that would require a reinstall of Monterey or a clean install.

Hi, I had this problem too but I solved it by doing the following:

• Open the Activity monitor
• Search for "quick"
• The Finder icon and name should pop up as a drop-down menu
• Open it
• Force quit the element "QuickLookUIService (Finder)" inside

Then you should be able to use quicklook feature like before!

Restart Finder by ...

1. Command + Option + Esc
2. Select Finder, then hit Relaunch

I have this same issue as well, and the restarting of Finder fixes it, however, this is just a workaround. I'd suggest that Apple take a look at this as it's clearly an issue for a number of people and there will probably be a load more not looking at this discussion thread.

Sure a relaunch finder works temporarily but this is not a fix - safe mode, first aid, etc, also not permanent fixes - last resort is to reformat the entire system - this has happened to me before on Catalina and only way it ever resolved was to do a clean install - i am having this same issue on monterey without any extraneous software - direct from apple store to home and having the quicklook fail after a while - just a bug i suppose

From the terminal.app

Reset Quick Look from terminal, copy & paste:

qlmanage -r

and reboot

Same problem that can be resolved by pressing alt + spacebar !!!

J'ai réussis à contourner le problème en pressant sut. ALT-SCAPEBAR !!!

RichardBolivar wrote:

When I press the space bar, the videos or images don't play, instead a thumbnail is displayed.

Well of course images don't play. But it might be the format of those particular .mp4 files. Do they open in QuickTime?

I know, and others don't.

This is not unusual. It is a matter figuring out what is different. CMM is one such thing, others may have antivirus, etc.

Many of the problems people are having with Monterey come down to either stuff like this, or older software that is not fully compatible. It is so easy to upgrade that some people have been doing it for years, never doing a clean install. That can lead to old stuff that suddenly breaks.

Not seeing any problem with Quicklook.

Do you by any chance have any antivirus or cleaner on this mac?

Sorry, cleanmymac is complete garbage and continues to corrupt systems.

Try uninstalling, following their instructions, but more likely than not it has already done some permanent damage.

I too have this problem. I have noticed that my 2019 MacBook is missing the EPS.qlgenerator file from System/Library/QuickLook. Could that be the problem?

M1 MacMini same issue – occurred after installing Monterey.

Force Quit helps for some time. But this is a bug. Hopefully, Apple will recognize the problem.