why are image thumbnails not displaying in finder since updating to sequoia on my m1 MacBook pro

Not a solution. Images are showing previews and thumbnails while others do not. For instance, I take 10 pictures on my iPhone and put them on the Mac.... out of those 10 images 5 or more will not have thumbnails visible. The photos have no difference in settings from the phone, etc. My issue is not just with .PNG files, but .HEIC, .JPG, and all of them are from my phone.

It only is an issue when the images are on my actual Mac hard drive. If I move the images that do not show a thumbnail to an external drive, the thumbnail works just fine. If I move them back to the system's internal drive, the thumbnails don't work again for those same images.

If I open them in Preview or any other software and save them or use the 'convert image' option in Finder, the thumbnails work, but of course the metadata is no longer 100% valid since it's a new file creation (from the system and not the original source).

Solved (for me). Using Sequoia 15.3 this issue happened for the first time using Pages (thumbnail). Came here to find answer - nothing. My solution was to click on 'View' in the Finder menu, open 'Show View Options' and to adjust the thumbnail icon size 'slider'. Alternating from larger to smaller you can watch the generic thumbnail placeholder disappear / reappear as all thumbnails increase / decrease in size. I preferred them larger so left it at increased size and issue is gone. It also seemed to work by going back to original size after adjusting back and forth a few times but I wasn't paying too close attention.

Sequoia. MBA M3

Select all the non thumbnail files.

Right click - Open with Preview

Cmd A to select all files opened

Cmd R 4x ( Yes I know)

Cmd Q to exit preview.

Note: This works with JPG files. Seems unhappy with PNGs and converts them to JPEG!

Enjoy.

The thumbnails all update for me.

Hope this helps.

I'm running Sequoia 15.3.2 on a MBP M4 Max 128Gb and the problem still persists. Tried all the supposed solutions with no success. 'Show icon preview' is ticked as you can see in the screenshot. Reported the issue to Apple but no response... and still no solution. Pretty annoying (understatement) when one has forked out £7k for a laptop to find that you cannot view thousands of photos because the thumbnails are not displaying!

This appears to be fixed! Must have happened with the 15.2 update.

Still a problem with 15.3.2.

Some jpg, png, tiff, HEIC, DNG and CR2 files randomly reappear, some not.

I am running 15.0.1. I am having the same issue mostly with PNG files and some Jpeg. I confirmed that it is not the file by copying it to a different older Macbook not running 13.4.1 without issue. Moving file to new location on the same computer does not resolve issue. Quick Actions/Convert Image creates a new file that shows thumbnail. Very frustrating.

For me I've isolated the issue down to only images from external sources, cameras and iPhones.

I am running Sequoia 15.2 and using an iPhone 13 Pro Max. Up until Sequoia I had absolutely no issues.

If I take photos on the iPhone and put them on my Mac (usually done via AirDrop), about 25-50% of the images show a white thumbnail afterwards. As shown in other posts, if you click a white thumbnail and have the preview sidebar open the image shows in that sidebar. Double clicking the thumbnail opens up the Preview program and displays the image.

The only way I have found to get my thumbnails to correct so far is to either open Preview (program) by double clicking the thumbnail and saving the image.

OR

Clicking on a thumbnail and going to the sidebar preview pane and clicking '... more' and then "convert image".

However, if I remember correctly, if I move the images with white thumbnails off of the system drives and on to an external drive, I believe that fixes the issue as well. I'd have to double check this once I do another photo dump.

philip@ wrote:

Solved (for me). Using Sequoia 15.3 this issue happened for the first time using Pages (thumbnail). Came here to find answer - nothing. My solution was to click on 'View' in the Finder menu, open 'Show View Options' and to adjust the thumbnail icon size 'slider'. Alternating from larger to smaller you can watch the generic thumbnail placeholder disappear / reappear as all thumbnails increase / decrease in size. I preferred them larger so left it at increased size and issue is gone. It also seemed to work by going back to original size after adjusting back and forth a few times but I wasn't paying too close attention.

That IS interesting! Yes, for me too, however the only way to get them all to show is at 80x80 sizing. If I increase more and more of the previews disappear. Very interesting development! Thanks! Now if I could just reset all my folders to be 80x80 instead of doing it manually, it'd be good until there's a fix.

Now that's strange. Rotated 4 times and no luck. Then rotated once again and they all appeared but were upside down so rotated again and all the thumbnails that were originally blank became blank again. Now that tells me definitively that there is a bug in the code associated with the flag associated with one of the rotation positions. Rotate it and the flag is Ok, rotate it back and the old flag is still there. This is an Apple program bug!!

Anyone know the process for inveigling (by flattery) Apple to fix the bug?

I'm using Sequoia 15.3.2 and I have the same issue only for some folders, and only for a few jpg pictures files. Adjusting the thumbnail icon size to 80x80 or to smaller sizes has solved the issue for me... The problem seems to appear for icon sizes of 84x84 and up....

For me, a few files show the thumbnail when the icon is fairly small, but even those don't show a thumbnail if the icon is anything bigger.

How can you tell when the slider has them at 192x192? I tried every step of the slider, and no thumbnail appears at larger sizes.

Please see Missing QuickLook thumbnail for supported… - Apple Community

Me too- my post about it:

Thumbnail Views in Folders- Some Are Blank - Apple Community

RyckyP wrote: "...Apple Support pull your finger out and get this resolved."

RyckyP ~ Apple isn't here in these user-to-user communities. Use this form:

Feedback - macOS - Apple

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