Downloading OSMC 1.0 for Mac from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this app available. OSMC for Mac is categorized as Audio & Video Tools. We recommend checking the downloaded files with any free antivirus. This free Mac app was originally developed by OSMC.
From the developer:
This app lets you play back media from your local network, attached storage, and the Internet. The app can play all major media formats out there and supports a variety of sharing protocols so you’re guaranteed to be able to stream from other devices.