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We've confirmed that these steps work on a brand new installation of macOS Sierra.

1. Install needed dependencies

Execute the following, this script will start by caching the sudo password:

./README.macOS.bash
source ~/.bash_profile

Note: This will install Homebrew if missing

2. Allow ssh to use the version of python in path, not the system python

Execute the following in your terminal:

mkdir -p "$HOME/.ssh"
cat >> ~/.bash_profile << EOF

# Allow ssh to use the version of python in path, not the system python
# BEGIN SSH agent
# from http://stackoverflow.com/questions/18880024/start-ssh-agent-on-login/18915067#18915067
SSH_ENV="\$HOME/.ssh/environment"
# Refresh the PATH per new session
sed -i .bak '/^PATH/d' \${SSH_ENV}
echo "PATH=\$PATH" >> \${SSH_ENV}

function start_agent {
    echo "Initialising new SSH agent..."
    /usr/bin/ssh-agent | sed 's/^echo/#echo/' > "\${SSH_ENV}"
    echo succeeded
    chmod 600 "\${SSH_ENV}"
    source "\${SSH_ENV}" > /dev/null
    /usr/bin/ssh-add;
}

# Source SSH settings, if applicable
if [ -f "\${SSH_ENV}" ]; then
    . "\${SSH_ENV}" > /dev/null
    ps -ef | grep \${SSH_AGENT_PID} 2>/dev/null | grep ssh-agent$ > /dev/null || {
        start_agent;
    }
else
    start_agent;
fi

[ -f ~/.bashrc ] && source ~/.bashrc
# END SSH agent
EOF

sudo tee -a /etc/ssh/sshd_config << EOF
# Allow ssh to use the version of python in path, not the system python
PermitUserEnvironment yes
EOF

3. Enable ssh to localhost without requiring a password

Currently, the GPDB utilities require that it be possible to ssh to localhost without using a password. To verify this, the following command should succeed without erroring, or requiring you to enter a password.

ssh <hostname of your machine>  # e.g., ssh briarwood

However, if it is the first time that you are ssh'ing to localhost, you may need to accept the trust on first use prompt.

The authenticity of host '<your hostname>' can't be established.
ECDSA key fingerprint is SHA256:<fingerprint here>.
Are you sure you want to continue connecting (yes/no)?

If the hostname does not resolve, try adding your machine name to /etc/hosts, like so:

echo -e "127.0.0.1\t$HOSTNAME" | sudo tee -a /etc/hosts

If you see ssh: connect to host <> port 22: Connection refused, enable remote login in:

System Preferences -> Sharing -> Remote Login

If you see a password prompt, add your SSH key to the authorized_keys file, like so:

mkdir -p ~/.ssh
ssh-keygen -t rsa -b 4096 -C "your_email@example.com"
cat ~/.ssh/id_rsa.pub >>  ~/.ssh/authorized_keys

After troubleshooting, verify one more time that you can ssh without a password and that ~/.ssh/environment exists, by running:

ssh <hostname of your machine> 
ls ~/.ssh/environment

If the ssh succeeded with out asking for a password, and that file exists, you are good to go. Remember to exit all of your ssh session before moving on.

4. Configure, compile, and install

At this point head back the main README.md, and continue from Build the Database.

Troubleshooting macOS specific issues:

Workaround for libreadline / libxml2 on OSX 10.11 (El Capitan)

Symptoms:

  • After Running ./configure,
  • You see output configure: error: readline library not found, and
  • in config.log you see ld: file not found: /usr/lib/system/libsystem_symptoms.dylib for architecture x86_64

There is an issue with Xcode 8.1 on El Capitan. Here's a workaround:

brew install libxml2
brew link libxml2 --force

Other workarounds may include downgrading to Xcode 7.3, or installing the CLT package from Xcode 7.3.

For more info, this seems to be the best thread

Disable System Integrity Protection

Note that you may need to disable System Integrity Protection in order to bring up the gpdemo cluster. Without doing this, psql commands run in child processes spawned by gpinitsystem may have the DYLD_* environment variables removed from their environments.