Images Appear grainy, pixelate and desaturated

Question

I am working on a 2023 MacBook Air and just updated PS (2025). I have several images in Google Drive that look great in GD, however, when I download, unzip, and open them in PS they are almost totally desaturated, grainy and full of lines. I have attached an example for reference. I have no idea how to remedy this. Help! : )

Trevor.Dennis · Answer

What exactly are we looking at? Is the right side a screen shot of the image in GD, and the left side the downloaded and opened in Photoshop? What about the mauve colour cast, which we are seeing on both sides?

To see atrefacts that dramatic, I am wondering if the uncompressing process might be the cause of it. What format do they unzip to?

Goodness! The above was pasted directly from your upload, but when I pasted into Photoshop it was worse. Something is very broken here. Can you share an uncompressed file?

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