You can download Nucleo 1.0.7 for Mac from our application library for free. The program relates to Theming Tools. This Mac app was originally developed by NucleoApp.
From the developer:
Nucleo is a library of icons with super powers.
You may want to check out more software for Mac, such as ARTIS Screen Loupe, Desktop Wrap or Color Labels, which might be similar to Nucleo.