forgotten administrator password
Hi,
I have searched and searched and all the answers I come across are not successful, can you help?
I have a macbook pro which came with osx lion installed - so no installation disc available. When setting up I decided on the administrator password which until now I have not needed and now can't remember. I have tried resetting the password in various ways but each time it asks me to pout in the password before I can reset it, which clearly I can't as I have forgotten it!
I have only one user account set up on the pro which is me as the administrator.
How can I change the password?
Many thanks for any help.
MacBook Pro, Mac OS X (10.7.5)