• Install monit using Homebrew (or macports):

brew install monit

• Create a directory for monit:

mkdir -p /usr/local/etc/monit

• Change directory to /usr/local/etc/monit and issue:

svn co http://svn.grimore.org/configuration-templates/monit/macOS/templates

this will have the effect of creating a templates folder that you can update with svn update when there are template updates.

• Checkout the monitrc file in the same directory:

svn export http://svn.grimore.org/configuration-templates/monit/macOS/monitrc --force .

and adjust as necessary.

• Change permission of the /usr/local/etc/monit/monitrc file to 0700:

chmod 0700 /usr/local/etc/monit/monitrc

and change the ownership to root and group wheel:

chown root:wheel /usr/local/etc/monit/monitrc

• Create the directory /usr/local/etc/monit/conf.d:

mkdir -p /usr/local/etc/monit/conf.d

• Create links from template files from /usr/local/etc/monit/templates/ into /usr/local/etc/monit/conf.d/ depending on what services you want running. For instance, to monitor Apache, you would issue:

ln -sf /usr/local/etc/monit/templates/openvpn /usr/local/etc/monit/conf.d/

• Change directory to /Library/LaunchDaemons/ and checkout the plist files:

svn export http://svn.grimore.org/configuration-templates/monit/macOS/launchd/ --force .

• Load the launchd files to start monit:

launchctl load -w /Library/LaunchDaemons/org.grimore.monit.plist
launchctl load -w /Library/LaunchDaemons/org.grimore.monit.reload.plist