Mac screenshot resolution (DPI) downgraded from 144 to 72 dpi after upgrade to Sonoma

I see, and have always seen throughout Sonoma (and earlier) versions, the screenshots come out at 144.

FWIW, dpi is irrelevant except for printing. You have an image that has four times more pixels,

6016x3884 instead of 3008x1692...

You can change dpi value in Preview, and that does nothing actually to the pixels - though it would affect the result if the image were to be printed at scale.

The "retina" resolutions are rendered offscreen at double size, then scaled - that is how your captured image has more pixels than physically exist in the screen.

The behavior you are seeing - getting the screenshot as 6016x3884 - seems correct, despite it saying 72.

If you are not printing them, then you should just ignore this, as it has no bearing on the actual contents of the image.

FWIW, I see the same thing. Personally I don't care for the change. You can let Apple know.

Feedback - macOS - Apple

On my M1-Mini it is correct with 144dpi (running 14.5).

But on the Studio (also 14.5) it is still 72dpi; while it is another 4k display, the exact same 32" model.

The two images are different, but not because of the resolution, rather, it's the way color was handled. Both texts appear to made up of ten pixels vertically, though they occupy twice that in the image, according to Preview. I am curious how you got screenshots at different resolutions, since that number is set by Apple, as far as I can tell.

Resolution is completely irrelevant with screen shots. If you grab a 50 x 100 pixel area of the screen, you're going to get a 50 x 100 pixel file, regardless of whether the resolution it gets set to is 1 or 1 billion.

Yes, same problem here. 4K Display is set to 3008x1692 and screen shot is 6016x3884/72 instead of 3008x1692/144. DPI were correct (144) until I updated (from Montery) to Sonoma.

Have reported it ...

FWIW, screen shots appear to be back to 144dpi, at least with Sonoma 14.5 on my M3 iMac.