Not being able to log in
I bought this laptop off of someone and they have resetted everything and they only gave me a guest user and I cannot make a new account without having an admin password and on the guest account i am trying to download roblox and it has banned secure websites unless parental controls with admin password and I do not have an admin account. Any advice to make one or to download roblox?!
MacBook Air 11", OS X 10.11