• Register for a Helix account.
• Configure one or more protocols or stacks.

• Login to your Mac and open the Calendar app.
• Navigate to the menu Calendar > Add Account... > Other CalDAV Account... > Continue.
• Change the Account Type to Manual.
• Set the Server Address to "health-helix.com".
• Enter your registered email address and password into the User Name and Password fields.
• Click on Sign In.
• Wait up to 60 seconds as the process completes; and see your Helix Calendar items synced!!

Note: The Calendar app creates an automatic heading. You will see the Helix Calendar under a heading such as "Gmail" if your registered email address was "...@gmail.com". This can be renamed in the menu Calendar > Settings > Accounts > "Gmail" > Account Information > Description.