You can make a difference in the Apple Support Community!

When you sign up with your Apple Account, you can provide valuable feedback to other community members by upvoting helpful replies and User Tips.

Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.

Quick fix for Quicklook not previewing files - follow up

I continue to have an issue in Catalina where hitting the space bar (having single clicked on an image or video file) fails to provide a "Quicklook" preview, as it did in Mojave.

This solution below from GonçaloCatarino, works for me (thanks Gonçalo), but after a certain amount of time, the problem then arises again, with Quicklook not working - even before my Mac has been restarted - in the same session.

Anyone have any additional advice on I might add to this Terminal command to make it permanent, not temporary?

sudo update_dyld_shared_cache -force

---------------------------------

Answer from 2018

GonçaloCatarino

quick fix for Quicklook not previewing files

This is not so much a question but rather a quick solution for this (somewhat frequent) problem:

#1 - open Terminal.app

#2 - Copy/paste

sudo update_dyld_shared_cache -force

#3 - it should take 1-2 minutes.

It worked for me.

----------------------------------

Posted on Oct 7, 2020 1:00 PM

Top-ranking reply

Old Toad

Level 10

210,615 points

Posted on Oct 7, 2020 1:20 PM

Boot into Safe Mode (How to use safe mode on your Mac - Apple Support) by booting with the Shift key held down and check there to see if the problem persists. Reboot normally and test again.

NOTE: Safe Mode boot can take up to 10 minutes as it's doing the following;

• Verifies your startup disk and attempts to repair directory issues, if needed

• Loads only required kernel extensions (prevents 3rd party extensions from loading)

• Prevents Startup Items and Login Items from opening automatically

• Disables user-installed fonts

• Deletes font caches, kernel cache, and other system cache files

View in context

Quick fix for Quicklook not previewing files - follow up

Similar questions