Download of Diapositive 1.0 for Mac was available from the developer's website when we last checked. We cannot confirm if there is a free download of this app available.
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 actual developer of this free software for Mac is MenuBar Labs. The software belongs to Design & Photo Tools.
From the developer:
Diapositive is an elegant and simple way to get your Instagram feed. With this application, you can access your own feed, the most popular posts, your liked post, profiles, and search for users and specific tags. The tool has been exclusively designed for OS X Yosemite.
You may want to check out more Mac applications, such as Cuadro or Resize Now, which might be related to Diapositive.