Download of Apprise 1.5 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 following version: 1.5 is the most frequently downloaded one by the program users.
This free software for Mac OS X was originally produced by Disqus. Apprise for Mac lies within Communication Tools, more precisely Social & Blogging. The bundle id for this app is com.adobe.apprise.2BD88CDEE5F8CFD8010094AE9CF3F4C9C891A505. 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:
An alert alternative for jQuery that looks good. Apprise is a very simple, fast, attractive, and unobtrusive way to communicate with your users. Also, this gives you complete control over style, content, position, and functionality. Apprise is, more or less, for the developer who wants an attractive alert or dialog box without having to download a massive UI framework.
You may want to check out more software for Mac, such as Telerik f!acedeck Client for Facebook, Kiss Me or Snabb, which might be similar to Apprise.