Ok thanks Ronnie, I'll implement that when back at base. Thanks for confirming 
my thinking on the cause of this issue.

Regards

Pete

> On 17 Jun 2014, at 7:17 am, Ronda Brown <ro...@mac.com> wrote:
> 
> Hi Peter,
>  
> If your wallpaper changes back to default after reboot or after logout it is 
> because the wallpaper you set is on another drive and this drive loads after 
> your settings are loaded.
> 
> Lion / Mountain Lion/ Mavericks does not save your wallpaper on the native 
> HDD, rather tries to load the wallpaper from the original HDD, only the path 
> to the wallpaper is saved in the OS X settings.
> When your OS X boots up it does not find the path to your wallpaper since the 
> HDD you've saved your wallpapers in has not mounted yet.
> 
> One basic solution for this is to save your wallpapers in the HDD where 
> you've installed the Mac OS X
> 1. Create a new folder, called My Desktop Images within the~/[Your user 
> name]/Pictures folder.
> 
> 2. Open a new Finder window and navigate to ~/[Your user name]/Pictures/My 
> Desktop Images
> 
> 3. Navigate to  > System Preferences > Desktop & Screen Saver and ensure 
> that the Desktop button is selected.
> 
> 4. With Finder open, drag the My Desktop Images folder to the Desktop & 
> Screen saver system preferences pane. When you see a white plus symbol inside 
> a green circle, release the mouse and the folder will be added.
> 
> Cheers,
> Ronni
> 
> Sent from Ronni's iPad4
> 
> 
>> On 17 Jun 2014, at 6:46 am, Peter Crisp <petercr...@westnet.com.au> wrote:
>> 
>> Hi there, I have a recurring minor thing occurring with my new 2014 13" 
>> Retina MBP. I use an external drive to hold my iPhoto library and I usually 
>> select a photo from the iPhoto library as a desktop picture.
>> 
>> Whenever I next reboot the MBP, the desktop image reverts to the default 
>> Mavericks Wave picture. It's a nice picture, but I want MY picture. I keep 
>> the external drive attached even during reboot but the order of activities 
>> during boot up may not see it until after it has set the screen picture. I'd 
>> have thought that OSX would 'localise' the image selected in a C:/ folder 
>> separated from the iPhoto library at the point when the image is selected as 
>> the desktop image and it would be there for use at all times.
>> 
>> Any clues how I can intervene on this default picture? 
>> 
>> Regards
>> 
>> Pete
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