Bizarre RGB Bug

[Adam Peac*ck]

When editing any image in RGB I get all kinds of strange drawing/ghosting/colour bugs, please see attached image. CMYK and Greyscale work fine and converting the RGB image to either eliminates the problem. (Screenshot is of a highly convincing Illuminati email invitation.)

I'm still stuck on Catalina, so if that is a likely problem please let me know so I can bug my IT department!

Many thanks,

Adam

[Adam Peac*ck]

Realised I somehow missed the same topic here: https://community.adobe.com/t5/photoshop-ecosystem/photoshop-artifacts-on-background/td-p/12335391 but the solution makes panning/zooming unusably slow.

[Adam Peac*ck · Accepted solution]

In case this is useful for others: Updating to BigSur has just fixed this bug for me.

[TheDigitalDog]

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@Adam Peac*ck wrote:

In case this is useful for others: Updating to BigSur has just fixed this bug for me.

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Probably due to a GPU bug fix in that newer OS. 

[J453]

Go to Preferences > Technology Previews and check "Deactivate Native Canvas" if you're on macOS 10.15.x. I don't believe the graphics drivers will be updated in 10.15.x/

Updating to BigSur (macOS 11.x) updates the graphics driver which fixes this issue. 

[Stewart5E99]

That litterally just worked for me. I was having the same issues. Turn off native canvas in Preferences, technology preview settings.