Hi Paul,

Do you mean you have 2 external Displays connected to your Mac, or do you mean 
You have 2 Desktops on your Mac (Spaces)?

If 2 Desktops (Spaces): Check that you have assigned certain Apps to a 
particular Space.
If you assign an App to a particular space, it opens in that space by default.

1. Press and hold an app's icon in the Dock. 
2. From the shortcut menu that appears -
* To have the App open in the current space: Choose Options > This Desktop
* To have the App open in the current space on a specific display: Choose 
Options > Desktop on Display (number).

* To have the app open in every space: Choose Options > All Desktops

* To have the app open in whichever space you're using at the time: Choose 
Options > None

Also check what settings you have in System Preferences > Mission Control 

Cheers,
Ronni

Sent from Ronni's iPad4


> On 3 Jan 2015, at 11:43 am, Paul Willemse <[email protected]> wrote:
> 
> Hi All,
> 
> when I restart my Mac the Apps do not go to the proper screens. I have 2 
> physical screens and my Apps appear to be displayed in a random order on the 
> physical screens.
> 
> Is there a file or pref that needs to be reset or have write permit turned on?
> 
> Regards,
> 
> Paul
> 
> OS X Yosemite 10.10.1
> 
> Mac Pro (Mid 2010)
> Processor 2 x 2.66 GHz 6-Core Intel Xeon
> Memory 12 GB
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