Skip to main content
Panther Knowledge Base

How do I resolve the Panther tool error "cannot be opened because the developer cannot be verified"?

  1. Last updated
  2. Save as PDF

Issue

I downloaded a tool, such as pantherlog, from the Panther Operations docs page. When trying to run the tool on a Mac, I see following error:

{tool} cannot be opened because the developer cannot be verified

Resolution

To resolve this, you can remove the quarantine restriction on the application via the following CLI command. Note: Please proceed carefully when using sudo and xattr commands, and contact your IT department if needed. 

sudo xattr -r -d com.apple.quarantine /path/to/pantherlog

Cause

This is a common issue on Macs due to running programs that were downloaded online.