Is Quick Look still broken in macOS 26 Tahoe?

[saldin]

I had posted about this issue last year when I noticed it with my then brand-new Mini M2 with Sonoma, but it's still present in Sequoia:

https://forums.macrumors.com/threads/quick-look-having-zoom-issues-with-png-files-i-swear-this-didnt-happen-with-my-high-sierra-mbp-but-im-noticing-it-in-my-current-sonoma-mini-m2.2427536/post-34056407

Thanks in advance.

 

[BigBlur]

Still broken in Tahoe. Zooming in on a PNG is blurry. JPG looks fine.

This is zooming in on a 1637 x 60000 image generated from a web page screenshot on my iPhone (similar to the example you created from Firefox).

PNG	JPG

 

[saldin]

It's a shame 😓

If it's not too much trouble, could I ask you to please submit a bug report using the Feedback app?

 

[iBookmaster]

Mine works fine but, I'm using the public beta.

 

[saldin]

Mine works fine but, I'm using the public beta.

Are you sure you've tested correctly?

BigBlur confirmed with receipts that it was broken for them on Tahoe beta (although not sure if public or dev, or what release): https://forums.macrumors.com/thread...roken-in-macos-26-tahoe.2463212/post-34058057 and I've also confirmed with other people running Tahoe dev beta 6 that their results match BigBlur's.

 

[iBookmaster]

Are you sure you've tested correctly?

BigBlur confirmed with receipts that it was broken for them on Tahoe beta (although not sure if public or dev, or what release): https://forums.macrumors.com/thread...roken-in-macos-26-tahoe.2463212/post-34058057 and I've also confirmed with other people running Tahoe dev beta 6 that their results match BigBlur's.

No, not sure. I just took a .png file and used quicklook and zoomed in and it looked fine on Tahoe public beta.

 

[saldin]

No, not sure. I just took a .png file and used quicklook and zoomed in and it looked fine on Tahoe public beta.

No big deal.

I'm aware it's difficult to appreciate if the image doesn't need zooming in in the first place... but if you were to take a rolling screenshot like BigBlur did and end up with a very long image (1,637 by 60,000 pixels in their case - but it doesn't have to be that long - my example image in the first post is 1,920 by 32,766) where you'll be forced to zoom in A LOT to try to notice the details, all you'll end up seeing will be blurs and smears.

For PNG files, Quick Look appears to set a zoom ceiling that's WAY LOWER than 1x; and when that ceiling is reached but you continue to zoom in, it will switch to interpolating the image instead of zooming, blurring it out and making it unreadable.

I've found other file types are also blurry when zoomed in with Quick Look, like PDF/GIF/WEBP, but the zoom ceiling in these cases is close to 1x; and while the details will be blurred, it will be mostly readable and less mangled than a PNG image.