An Atom theme for a more native experience on OS X 10.10 Yosemite
From the command line:
$ apm install yosemite-unity-uiAlternatively, open Atom Preferences, select Themes > Search for yosemite,
then Install.
Activate the theme by selecting the Themes section of Preferences.
If you wish to replace the official Atom Icon with the following Atom-Yosemite-Icon designed by Rory McCawl just follow these steps.