How to set positioning/filling of desktop background image with AppleScript How can I set the positioning/filling of the desktop background image from the command line with one of the available options listed in the Desktop &amp; Screen Saver preferences:

Crop, SizeToFit, FillScreen, Centered, Tiled

I can set the desired background image itself using:

osascript -e "tell application \"Finder\" to set desktop picture to POSIX file \"/Library/Desktop Pictures/Beach.jpg\""


However I'm not sure how to set the positioning/tiling.
According to

'AppleScriptEditor' &gt; File &gt; Open Dictionary &gt;
   Finder &gt; Legacy Suite &gt; Application &gt; desktop picture


all you can do is set the picture.

There are references to messing about with the .plist file, but the internet (and Apple) are silent on an Applescript-approved route.

This plist is empty for me in Sierra:  ~/Library/Preferences/com.apple.desktop.plist so I imagine Apple have hidden what used to be there inside one of their even less well documented databases.