Unable to empty lockdown folder
My desktop (running Catalina 10.15.4) won't recognize my iPhone in the finder. It does appear in the list of USB devices, and the iPhone software is up to date. The phone also appears on a different Mac when I plug it in, so not the phone or the hardware apparently. I've uninstalled the antivirus software from my Mac.
So I think I need to clear out my lockdown folder; fine. I can unlock it using my admin password from my admin account, but when I attempt to change the permission for "everyone" to read & write I'm told "the operation can't be completed because you don't have the necessary permissions." I only have the one admin account on the machine, so I'm not sure who else would have the needed permissions. Any suggestions would be much appreciated!
iMac 27", 10.15