Wallpaper loads after showing grey screen on startup....after Sonoma upgrade

Until Apple fixes this, this will make work.

Open Terminal.

Write: killall Dock

This drove me crazy for 2 hours today, found a fix on Reddit, give it a shot, worked for me! :

go into Mission Control, add a Space, and delete your default space. This fixes the problem!

I'm exactly the same @execentric (and on same iMac)

What's weird is that when I first updated to Sonoma I had wallpaper on my main display but not on my external display. I then logged in the next day and both displays are showing no wallpaper, just black screens!? Doesn't matter whether I choose dynamic or static wallpaper, or one of my photos. As well as that- the screensaver that was working has now gone black too!?

Mine still periodically acts up after logging out. It definitely has something to do with Spaces - Spaces is very "spaced out" at the moment. I'm sure Apple will get it fixed eventually. Until then, we have these 2 fixes that will get the wallpaper back.

I can't get the wall paper to load at all now I have upgraded to Sonoma! iMac 2019 4k retina.

Not even a basic picture!

Any suggestions, please?

FYI - I'm on iMac 2019 5k retina

Thanks MRYFLYGUY - that did it!