When attempting to install Symantec Endpoint Protection (SEP) for Mac, installation fails with error message "failed to launch helpertool"
"Failed to launch helpertool
Symantec Endpoint Protection package cannot be installed. Helper tool of installer fails to launch it. Please contact administrator."
• SEP 14
• MacOS 10.9 and later
In other SEP 14 versions where this error is occuring because /tmp is not a symbolic link to /private/tmp, re-creating the link allows SEP installation to proceed:
# may want to copy/move files in /tmp to /private/tmp first
sudo rm -rf /tmp
sudo ln -s /private/tmp /tmp
SEP 14 RU1 MP1 or newer should install despite an unlinked /tmp folder.
Make sure that the helpertool is given the proper permissions and try to continue the installation:
sudo chmod 644 /Library/LaunchDaemons/com.symantec.sep.SEPInstallHelper.plist
For information on how to obtain the latest build of Symantec Endpoint Protection, see Download the latest version of Symantec Endpoint Protection.