Level 1

4 points

Quicklook .PSB (Photoshop Files) in Finder

I’ve noticed that for all my Photoshop files larger than 4.3GB, the thumbnail disappears and I no longer get a preview of the image.

This issue has existed for several years, and there used to be a small plugin available online to work around Apple’s bug, but there’s no solution anymore starting from OS 15.X.

Does anyone have a fix for this problem? Will they finally muster the courage to tackle and solve this issue?!

(The image names = their size in GB)

Mac Studio, macOS 15.4

Posted on Apr 9, 2025 10:02 AM

Top-ranking reply

Kurt Lang

Level 9

68,700 points

Posted on Apr 10, 2025 8:57 AM

Figured it out. It's a size limitation at the OS level.

Size as in, not how much space the file takes up, but how many pixels it is in the height or width. And that size appears to be right around 38,990.

Any file with that as the larger pixel dimension in the height or width or smaller will produce an icon. As seen here, it only took a 9 pixel increase to get a file with no icon. Anything larger also will not produce an icon.

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21 replies

Kurt Lang

Level 9

68,700 points

Apr 9, 2025 1:31 PM in response to dialabrain

A small technical error on my part. 30,000 won't trigger the requirement for a .psb, but 30,001 or more will.

dialabrain

Level 10

136,127 points

Apr 9, 2025 1:53 PM in response to Kurt Lang

Kurt Lang wrote:

A small technical error on my part. 30,000 won't trigger the requirement for a .psb, but 30,001 or more will.

Now you tell me. lol

FWIW, PSE won't do 30,000+

Kurt Lang

Level 9

68,700 points

Apr 9, 2025 4:48 PM in response to dialabrain

That doesn't surprise me. PSE isn't a tool aimed at the pro market. It's a good guess Adobe figures no one using PSE is trying to create billboard size images.

Kurt Lang

Level 9

68,700 points

Apr 9, 2025 4:49 PM in response to Erickeee

I didn't try any that big. I'll create a handful of randomly sized larger image tomorrow and see what I get for previews.

dialabrain

Level 10

136,127 points

Apr 9, 2025 4:52 PM in response to Kurt Lang

I'd be surprised if Adobe could depend on billboard designers. 🤔

dialabrain

Level 10

136,127 points

Apr 10, 2025 8:59 AM in response to Kurt Lang

Kurt Lang wrote:

Figured it out.

I had faith. 😎

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Quicklook .PSB (Photoshop Files) in Finder