The above message is caused by a Security change made to the MAC OS X Operating System
where by the System Integrity Protection or SIP for short prevents all users
including the root user from writing to the certain filesystems.
This is detailed in an article from Apple at this link:
The only workaround is to disable that security feature and rerun the installation of CA Client Automation.
For details of the steps to take to disable System Integrity Protection in MAC OSX please do a web search
for the terms “disable SIP” or “Disable System Integrity Protection MAC OSX”
And there are many sites that details the steps.
The reason CA Technologies Support doesn’t not list the steps is that it involves disabling a
security component of the operating system.
Please consult with the MAC support team should you need assistance with this procedure.