You contact me @elrumo on Twitter or by email.
To view all the icons and submit new ones, go to visit macOSicons.com.
For a more visual guide checkout our Instructions page.
You just need to download the icon you want, find the app to update on Finder, select it and "File/Get Info" or "cmd + i and drag and drop the downloaded .icns file to the new window.
Download the template for Sketch, Figma, Pixelmator, Photoshop or Illustrator from the Resources page.
Here are some rules you show know:
- When using the template, export in 1x (high res).
- Go to macosicons.com and click on "Contribute"
- If you are creating an icon for an open-source project, please consider submitting the icon to their respective repository for their use as well.
Credits can be seen on macOSicons.com