Mavericks: User no longer owner of Home folder and content One of the Users (called: The_Problematic_User) of a Mavericks installed MacBook Pro is no longer owner of the Home folder and content. Here's what we've tried to no avail:


restart computer and log in recovery mode (Command-r) and;

repair disk permissions,
repair disk,
with resetpassword (command line),
reset Home Folder Permissions and  ACLs,
reset password,

restart computer and log in single user mode (Command-s which is root access) and;

Strip ACLs on all account items with: chmod -RN /Users/username
response: chmod: Failed to clear ACL on file ...
Try to regain ownership of files and folders with: chown -R username:staff /Users/username
response: chown: username: illegal user name (where username was the user name of the user, obviously)
Try to assign ownership of files to root with: chown -R root:staff /Users/username
response: chown: /Users/username/*: Read-only file system (where * represents all the files and folders in the directory)



Another thing: when I ls -l /Users here is what I get:


drwxrwxrwt  6  root wheel 204  Feb 24 10:53 Shared
drwxr-xr-x+ 12 501  staff 408  Mar 21 17:16 A_user (with admin privileges)
drwxr-xr-x@ 47 502  staff 1598 Mar 15 12:03 The_Problematic_User
drwxr-xr-x+ 24 505  staff 816  Jan 10 15:11 Another_user


What is the @ doing instead of the + in the permissions of The_Problematic_User?

For info: The_Problematic_User does NOT have admin privileges
An erroneous extended attribute has been applied to this directory somehow, but it can only be removed using the xattr Terminal command. You should take a look at a brief explanation here.  A more detailed question and answer can be found at this StackOverflow page.