I have an Excel worksheet that is in a shared folder in my Mediafire account. When I try to open it from a computer different from the one I created it with, I get a popup that the file is read-only and when I try to change permissions in Excel, I get "Your computer isn't set up to use restricted permissions."
Using Excel Mac 2011. How do I correct this? I have used the "Get Info" and set the file to be readable and writable by everyone. Still get the popup.