To set the wallpaper as your PC Wallpaper, right click on the wallpaper,
and then select “Set as Background” or "Set
as Desktop Background" or “Set as Wallpaper”
(whichever option is available on your browser).
For Mac control click on the image and select “Save Image As”
or “Download Image to Disk” (depends on your browser
option). Choose a location and click “Save”, then open
your System Preferences and click “Desktop & Screen Saver”.
On the Desktop page, click “Choose Folder” and navigate
to the save image file. Select it and click “Choose”.