mattermost/doc/install/requirements.md

Requirements

Web Client

Supported Operating Systems and Browsers:

• PC: Windows 7, Windows 8 (Chrome 43+, Firefox 38+, Internet Explorer 10+)
• Mac: OS 10 (Safari 7, Chrome 43+)
• Linux: Arch 4.0.0 (Chrome 43+)
• iPhone 4s and higher (Safari on iOS 8.3+, Chrome 43+)
• Android 5 and higher (Chrome 43+)

Server

While the pre-released version of Mattermost is not currently supported in production, the intention from the product team is to support:

• Ubuntu
• Debian
• CentOS
• RedHat Enterprise Linux
• Oracle Linux

The Mattermost roadmap does not currently include production support for Fedora, FreeBSD or Arch Linux.