With new, granular set of permission rights comes ... a bit of pain.
The problem
After upgrading to OSX Sequoia my terminal of choice - Warp started having weird seemingly permission-like issues. Even simple operations like ls sometimes failed with Operation not permitted (os error 1):
ls /Volumes/BACKUP/
"/Volumes/BACKUP/": Operation not permitted (os error 1)
But other apps like Finder had no problem accessing said folder.
The solution
Eventually I noticed that the issue happened always when I tried to access data on an USB thumb drive. Remembering that apps in newer OSX do not have permission to just access disk willy nilly, I opened: System Settings -> Privacy & Security -> Full Disk Access, changed the toggle for Warp to enabled and let the app reboot. And voila! Now it works again.
 
 
              

 
    
Top comments (3)
Thanks, that's exactly what I needed. Very clear, and concise description.
It worked for me with BBedit, Thanks! I allowed "Full Disk Access" (now blue button) in Settings/Privacy&Security,
I still have to quit BBEdit and reopen the app before it accepts saving a file
Mac OS 15.6.1
Thanks a lot!
Very helpful, as this is OS version specific.