Welcome to the EOS.IO: The Most Powerful Infrastructure for Decentralized Applications
The EOS.IO software enables developers to create and deploy high-performance, horizontally scalable, blockchain infrastructure upon which decentralized applications can be built.
This code is currently alpha-quality and under rapid development. That said, there is plenty early experimenters can do including running a private multi-node test network and developing applications (smart contracts).
The public testnet described in the wiki is running the dawn-2.x branch. The master branch is no longer compatible with the public testnet. Instructions are provided below for building either option.
Supported Operating Systems
EOS.IO currently supports the following operating systems:
1: Amazon 2017.09 and higher.
2: Fedora 25 and higher (Fedora 27 recommended).
3: Ubuntu 16.04 and higher (Ubuntu 16.10 recommended).
4: MacOS Darwin 10.12 and higher (MacOS 10.13.x recommended).
Source
EOS.IO Website