Libecomlodr.dylib

 1. Remove Adware

     Run  the latest release of Malwarebytes for Mac to remove malware/adware, if installed on your Mac.

     For instructions:  Install Malwarebytes for Mac v4   Uninstall Malwarebytes for Mac

     Click the “Scan Now” button. Once done, quit Malwarebytes for Mac.

     Restart the computer and relaunch Safari holding the shift key down.

     Repeat the scan couple of times.

 2. Additional steps to take if necessary (1) 

  1. Remove unknown extensions:  Safari > Preferences > Extensions

      https://support.apple.com/guide/safari/use-safari-extensions-sfri32508/mac

  2. Reset search engine:    https://support.apple.com/guide/safari/customize-your-search-ibrwe75c2a3c/mac

  3. Reset  Homepage.   https://support.apple.com/guide/safari/set-your-homepage-ibrw1020/mac 

  4. Restart your Mac. Relaunch Safari holding the Shift key down.      

3. Additional steps to take if necessary (2)

   1. Remove unknown profiles.

      System Preferences > General > Profiles

      Open System Preferences, click the “Profiles” icon ( a checkmark on a gear) .

      When Profiles pane opens, select the unknown profile and click the minus button at the bottom.

       Profiles: https://support.apple.com/guide/mac-help/configuration-profiles-standardize-settings-mh35561/mac

  2. Remove unknown Login item.

       System Preferences > Users & Groups > Login items

       Authenticate and unlock the lock.

      Highlight the unknown login item  and click the “-“ button at the bottom left to remove it.

Our IT guys at work had this to say:

"The file in your ticket is with the Symantec Endpoint Protection that we have on our Macs. See if you are able to uninstall the app. If you are, you can reinstall Symantec Endpoint. That should resolve your issue."

Worked for me but I'm on a corporate computer, so your mileage may vary.

Unless your employer requires you to use Symantec Endpoint Protection you should uninstall it according to the developer's instructions. There is no need for any "cleaning", "optimizing", "speed-up" or anti-virus/protection apps. They are more detrimental to the system and application performance than good.

The macOS system's SIP (System Integrity Protection) does not need any help. Just follow the recommendations in Effective defenses against malware and other threats - Apple Community.    

I’ve started getting the same alert and I’ve also tried moving it to the trash.

Doing some local searches and extensive googling, it looks to be part of a Symantec product for computer management set up by my IT and updates to Catalina have started triggering the warning.

I found a reference to it in the Library / Application Support / Symantec / SMC / tools / smbinst.sh file

Further googling lists it as a file that gets removed by Symantec removal scripts.

I’m going to guess that an update to the app is going to fix it or get it signed so that Catalina stops freaking out.

I'm using Symantec Endpoint Protection.

The same issue appeared on my laptop after upgrading to Catalina 10.15.4. After the upgrade of Catalina, the error message came. Symantec didn't recognised the virus definitions version.

I was searching for the error on the web, but finally I uninstalled Symantec Endpoint Protection with a Mac OS reboot.

Then reinstalled Symantec Endpoint Protection, reboot Mac OS and launch the Symantec updates.

The error didn't reappeared.

The same issue appeared on my laptop after upgrading to Catalina 10.15.4.

Reinstalling Symantec Endpoint Protection and reboot, then error didn't reappeared.

Hello charity103,

Welcome to the Apple Support Communities. I understand there is a notification asking to remove a specific file, but it continues to prompt after being removed. I'll do what I can to help.

These suggestions might work for you:

• Try removing the same file in safe mode: Use safe mode to isolate issues with your Mac
• This might be a system file, so if there are still issues removing it in safe mode, try backing up and reinstalling macOS: How to reinstall macOS from macOS Recovery

Thanks.

This file is referenced in https://knowledge.broadcom.com/external/article?legacyId=TECH134761

On a Mac computer, the GatherSymantecInfo tool will gather technical information specific to Symantec products.

The following information is shown in this report:

5.NIS 6/NFM 7 definitions' libecomlodr.dylib, definfo.dat and usage.dat files