MoonPhase 1.1 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The software lies within System Tools, more precisely Dashboard Widgets. This free Mac app is a product of Udell Enterprises Inc. 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.
From the developer:
MoonPhase is a dashboard widget that provides a live simulation of the current phase of the moon. In addition to the image, it also shows the length of time until the next (and since the previous) new or full moon.
Note
OS X 10.5 or higher is required.
You may want to check out more Mac applications, such as Deluxe Moon HD - Moon Phase Calendar or Moon Phases - Lunar Clock, which might be similar to MoonPhase.
Science Tools
Science Tools