I have the same problem. I received a new MacBook Pro yesterday, so I transferred the content of my old MacBook to the new one. Now it is impossible to remove, install or uninstall Fortinet. Here is what happened:
- I made a backup of the old MacBook (running OS Monterey 12.4) with TimeMachine
- I used OSX Migration Assistant on the new MacBook (running OS Monterey 12.4), to transfer the TimeMachine backup
- At the end, there was an error message, saying that some data related to FortiClient and FortiClientUninstaller could not be transferred
- Now, on the new MacBook, I have both FortiClient and FortiClientUninstaller files in the application folder that a) have a size of zero b) are locked, impossible to unlock, impossible to delete.
I've tried various things, including the above command, but nothing works.
Thanks a lot if anyone has any advice on what to do.