Lion resets my wallpaper to default "galaxy" pic after every restart

What Sir Steevus wrote on 14 and 22 August 2012 worked for me. Thanks!

Message was edited by: Talk2pj

I have read through all the posts on this topic. It's all incoprehensible, ineffective for me.

With Mountain Lion, I can have as many desktops as I like and can set a different background picture on each, no problems. I can also choose a folder of pictures to change the background randomly, as long as I choose the SAME set of pictures for every desktop. But as soon as I select a DIFFERENT set of pictures to change randomly on each desktop, that's when they all revert to the galaxy background when I select them. Took a while to figure this out, but that's it. BTW, none of the discussion about guests, logging out and in, etc. applies since it's my computer, I'm the only user and the only time I shut down is (a) when I'm going to be away for an extended period or, (b) when the computer freezes and there is no other option. Guess it's just a bug I'll have to live with.

In response to quitsayingmetoo:

Man, you need to quit being a "know it all" kind of computer geek. It just makes people not like you. Get some sunshine; it will make you a nicer person.

I found the solution to this problem. Every before weren't working with my MBP Retina 15". The easiest way is just to change format from ( I think most popular ) JPG to PNG. Then you can copy this file into Desktop pictures in the library. When the wallpaper is set everything is ok after rebooting or changing users. Hope I helped You 🙂

I've been really annoyed by this and the only way of changing it is to select a wallpaper just before you update the system and it will stick, until you delete/move it from the location.

But today I was looking at good images online and chose to set a picture as my desktop background from Safari, I then restarted my Macbook Pro and it stuck, so you can always upload your pictures online, or find ones that you like.

Hope I helped.

Found this in Yahoo and it works for me, just do everything he sais, hope it work for everybody.

SilverTonguedDevil

Not "OS X". That's what all Macs since 2003 use, so it doesn't tell anything. The "X" means Roman numeral ten. Complete the version as OS 10.5, or 10.6, or 10.7, or 10.8.

What does this "something else" look like? Is it the default Aurora picture of OS 10.7?

If it keeps going to the default spacey picture, do this....
-- Open Disk Utility.
-- Select the "Macintosh HD" at the left frame of the Disk Utility window.
-- Select "First Aid" tab.
-- Click the "Repair Disk Permissions" button.
-- When it finishes, quit Disk Utility.

Next....
-- Go to the top menu bar, Click the "Go" menu and choose "Go to Folder".
-- Type (or copy here and paste)...
~/Library/Preferences
-- Find this file and trash it:
com.apple.desktop.plist

Lion 10.7.5 joined to AD with Management Prefrences applied to computer-lists OR users

All MCX that I tried so far work OK, apart from Desktop Picture

The correct MCX gets applied to the machine/user as reflected by entry in com.apple.desktop.plist

Yet the background is always Andromeda Galaxy.jpg

As the preference is set to Often user can change background, but on next boot it reverts back to Andromeda Galaxy.jpg

That is simply insane! Tried each & every "fix", none makes any difference at all

Seb