Acode brings the native look and feel and the ease of use of macOS to Atom. This UI theme adheres the closest it can to the current Apple Human Interface guidelines, it's a major redesign of the entire Atom interface that gives you a more polished and improved experience. It has support for high-resolution displays (retina), a color scheme, native tab behavior, a custom set of file type icons... and a lot more!
If you have the Atom Package Manager installed you can run:
apm install acode-ui
Navigate to Settings > Install, select Themes, and search for acode-ui. Once installed, this theme can be activated by going to the Settings > Themes section and selecting "Acode" from the UI Themes drop-down menu.
Acode is licensed under the MIT license. (http://opensource.org/licenses/MIT)