wget https://raw.githubusercontent.com/tezos/tezos/alphanet/scripts/alphanet.sh
brew install wget
chmod +x alphanet.sh
./alphanet.sh start

./alphanet.sh client get balance for my_account
./alphanet.sh client get balance for my_identity

./alphanet.sh client forget contract "my_account"
./alphanet.sh client originate free account "my_account" for "my_identity"

./alphanet.sh --help