screen saver on Big Sur. Try to use my photos for slide show but even when I chose photos screen saver says no photos

I have the same problem for the screen saver. Backgrounds work just fine, library is set as system library (option is greyed out)

cannot do anything with the source selection. I've deleted the screen saver plist, rebooted a few times, nothing seems to work. Photos finds all the pictures, changing desktop background works, etc.

My aircraft photos library is very large, but it has been working until today. I'm not aware of any changes that would have broken this.

Hi

Is your library set as the system library? Open photos preferences. Is the circled button greyed out? If not, click it.

I have a slightly different problem. The screensaver and desktop can both find the Photos library I want to use, but the screensaver is using the unedited versions of the pictures instead of the ones I carefully cropped and rotated etc (in Photos). Of the many screensaver problems created by various OS updates (why??), this is a new one.

That seems to be a new bug in Big Sur - report it to apple here. Hopefully if enough do, they'll fix it.

https://www.apple.com/feedback/photos.html

here you can see the desktop background picker works just fine:

After several minutes, I got the drop down for the source to appear, but it was unusable:

I don't know what to do to move forward here...

That is talking about iLife (so iPhoto? not Photos?)

Which app are you using?

Which version of MacOS do you have?

Have you tried the Photo Library at the bottom of the drop down?

Thank you, I have done that.

I mean, thank you for the suggestion, which I followed!

Button is greyed out but screen saver still shows "no Photos"

Have you selected photos as the source in the dropdown?