Sharing and Permissions Problem
When I open "info" on my iMac HD, I see three "Names/Users?" under "Sharing & Permissions"
When I try to change the "privilege" on the "everyone" account to "Read & Write", I keep getting the error message:
"The operation can't be completed because you don't have the necessary permission"
How can this be? I am the sole owner and registered user/administrator of this computer.
How did the "Names" in the Sharing & Permissions area get their names?
One name is "system", the second is "wheel" and the third is "everyone"
I bought this computer brand new, how did those names get there?
More importantly, how do I change the permissions to "Read & Write" ?
Please help, thanks
iMac (Retina 5K, 27-inch, 2017), macOS High Sierra (10.13.6)