Administration Guide : Installing Xinet : Install Xinet Server on a Macintosh Server (first time or upgrade)

Install Xinet Server on a Macintosh Server (first time or upgrade)
Use these instructions if you are installing the Administration software for the first time or if you are upgrading to a newer version on a Macintosh server.
Note: Before completing an upgrade, back up your database on the Xinet Server. For more information, see Backing up and restoring data.
The following software must be installed before installing Xinet Server on a Macintosh server if you want it integrated with the Xinet solution:
Important: Disable SIP before installing Xinet on OS X 10.11 El Capitan
Installing Xinet on El Capitan no longer works due to Apple's System Integrity Protection (SIP) that prevents writing to any low level path like /usr. To get around this, you need to disable SIP.
Warning: The point of SIP is to prevent malware and other unwanted modifications into system files. Consider whether or not you want to dispense with this protection.
For the following to work, you must have a proper and up to date Recovery partition on your boot drive. While that should be a given, it’s possible to clone a startup volume without Recovery installed. From the Utilities menu in Recovery select Terminal. Use the Terminal in Recovery to enter the SIP-disabling command.
Follow these steps to disable SIP:
After you install the Xinet software (see next section), re-enable SIP by following the above steps, but using the command “csrutil enable” instead.
Install Xinet Server on Macintosh server
In a browser, open, on the top right corner click Portal > Xinet Portal and log into AXI Support.
Click Downloads > Released Software.
Open the Xinet directory and download the latest Xinet installer tar file.
The welcome installation dialog box is displayed.
Click Continue.
The Xinet End User Software License Agreement is displayed.
Click Read License and click Agree.
The Select a Destination dialog box is displayed.
Click Continue to perform a standard installation.
The files are written to your installation directory and once finished the status of your installation is displayed.
Click Close.