Chosen Solution

An year ago, i had installed Mac OS 10.7 on a new HDD purchased. It was working fine for few days and then, it locked me out. As i could not remember the password. Since then, i had tried most of the available TS Steps on apple thread, but, unable to reset or reinstall the OS again. Any help?

Use a retail version of 10.6. Insert and boot from it holding down the “C” key on startup.It may be on the second page of the installation when the upper menu bar appears. Go to Utilities > Reset Password and do it.