Modifying a file's owner

[jchildress]

I have a file that, for some reason is set to "No Access" for Everyone in the Sharing & Permissions of the file.

I tried to change the owner of the file to another user (with admin rights) but when I type in the name of the new user, OSX tells me that the name I entered is invalid.

Is this new file owner the same thing as the account names I have setup in System Preferences? If so, why would I not be able to change the user.

 

[BlueRevolution]

It's the same as that user's "short name" as set in System Preferences, or the name of their home folder. OS X's account usernames are different. Bear in mind that names are case-sensitive.