I cannot delete my own folder
Using Sequoia 15.0.1 with my MacBook Air 2020 M1, I wish to delete a folder for an old project. I have copied that folder to an external disk, and now I am ready to delete that whole folder from my internal SSD drive. I tried:
Selected the folder, ⌘-delete. "Are you sure...", clicked "Delete".
-> "The operation can’t be completed because some items had to be skipped..."
Selected one item in the folder (a PDF file) , ⌘-delete. "Are you sure...", clicked "Delete".
->"The operation can’t be completed because you don’t have permission to access some of the items."
Get Info (⌘-I). "Locked" was UNchecked. Permissions are:
gil (Me) Read & Write
staff Read only
everyone Read only
Clicked on the lock icon. "Finder want to change permissions..."
Entered password. The lock opened.
Tried to change "everyone" to "Read & Write".
->"The operation can’t be completed because you don’t have the necessary permission."
Tried to change "staff" to "Read & Write".
->"The operation can’t be completed because you don’t have the necessary permission."
Tried to change "gil (Me)" to "Read only".
->"The operation can’t be completed because you don’t have the necessary permission."
This is my machine and I created that folder and the files within it. No one else should have permission to mess with my files. What do I have to do to assert my ownership and delete this old folder?
--Gil
MacBook Air 13″, macOS 15.0