Deleting Desktop Background Images I want to free up some space on my hard drive by deleting things and I found that 2GB were being used just on desktop backgrounds. I don't particularly care what my desktop background is so I'd like to delete these files. 

Unfortunately, no matter what I try, I can't seem to delete these files. 

Things I've tried:


sudo rm ./*
deleting them through finder
chflags nouchg location/nameoffile.extension - i.e. unlocking the file
giving Terminal Full Disk Access


How can I delete these files?

Thanks,

Update: My version of macOS is 10.15.3
Okay I think I've figured it out. This was the recipe that worked:

Delete the Files


Reboot into recovery mode
Open the Terminal from the "Utilities" menu
csrutil disable as suggested by da4 (thanks!)
Reboot
mount -uw / i.e. mount the filesystem as writable
sudo rm -r "/System/Library/Desktop Pictures"/*


Restore System Integrity Protection


Reboot into recovery mode again
Open the Terminal from the "Utilities" menu
csrutil enable
Reboot