Download of HueGo 2.4 for Mac was on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The most popular versions among HueGo for Mac users are 2.3 and 2.1. The bundle identifier for this application is com.pidog.huego.
Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. The software is included in Design & Photo Tools. The actual developer of this Mac application is piDog Software.
From the developer:
HueGo allows users to sample colors from their display or from a color prism and save a HUEGO document for later reference or for sharing or just use the live RGB view to get a quick color value.
Color values can be copied in a variety of formats ranging from basic color values to css values to cocoa color snippets. If you don't see the format you'd like, you can create custom formats to copy color codes your way.
You may want to check out more software for Mac, such as FlipBook Creator for Mac, which might be similar to HueGo.