Build Private Chain
I want to build a private chain in my iMac. I would like to use Proof of Authority (PoA) for private chain, not Proof of Work (PoW). There are so many Ethereum clients, such as Parity and go-ethereum (geth). I want to use geth, because it has 6,574 stars on GitHub.
Download GETH
I download it to /Users/yen/Downloads，you can add geth to environment PATH.
$ ls
geth
geth-alltools-darwin-amd64-1.6.7-ab5646c5