Installing Symantec Endpoint Protection on macOS Sierra (10.12.x)

Richard LaHue
2016-10-18 21:48

When Apple releases a new major version of their operating system (formerly OS X, currently macOS), Symantec has to release a new version of Symantec Endpoint Protection ("SEP") that is compatible with Apple's latest operating system. Apple changes and improves the security model of their OS with each major release (e.g. the System Integrity Protection feature introduced in OS X 10.11 El Capitan), and Symantec has to change the way their security software runs on the system to comply with Apple's security advances.

While it can be annoying to have to uninstall & reinstall SEP every year, it's a small price to pay for large strides in security. These instructions are intended to walk you through the process of (1) uninstalling the old version of SEP running on your system (before or after you do a major version upgrade of the OS) and (2) installing the latest version of SEP compatible with your OS.

Note: Don't run two antivirus programs at the same time! Instead of complementing each other, they will get in the way of each other, and leave you with a system that's less secure than it would be if you had no antivirus applications installed. If you have another antivirus solution installed other than SEP, be sure to uninstall it before you upgrade to the latest version of SEP.

Remove Old SEP Installation


  1. Download & unzip the following file, which has been shared with you on Google Drive: SEP 12.1.6 v6 (macOS 10.12)
  2. Double-click Symantec Uninstaller.pkg.tgz to unzip it.
  3. Double-click the Symantec Uninstaller.pkg to run it. It installs the Symantec Uninstaller application in the /Applications/Symantec Solutions folder.
  4. Navigate to /Applications/Symantec Solutions and double-click Symantec Uninstaller to run it. The computer will need to restart when it's done.

Install Latest SEP

  1. Navigate back to the unzipped SEP 12.1.6 v6 (macOS 10.12) folder.
  2. Double-click Symantec Endpoint Protection.dmg to open the disk image.
  3. In the window that pops up, double-click the Symantec Endpoint Protection Installer icon to run the installer. The computer will need to restart when it's done.
  4. You're done!

If you have any questions, shoot me an email.

- Richard (2016-10-18)

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