Download of MiniGrand 1.0 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. MiniGrand for Mac lies within Audio & Video Tools, more precisely Music Production. The actual developer of this Mac application is inMusic Brands Inc. We recommend checking the downloaded files with any free antivirus.
From the developer:
Mini Grand is a simple-to-use yet powerful virtual piano instrument with seven different acoustic piano sounds to suit a broad range of musical styles and production needs. It provides premium quality piano samples and offers to recreate realistic string resonance behavior. The tool comes with a built-in room simulation function and supports equal and stretched tuning.
You may want to check out more software for Mac, such as Mini Grand by inMusic Brands, which might be related to MiniGrand.