I forgot my administrator password and every time I want to shut my mac air down, I had to enter an administrator name and password which I forgot. What should I do to unlock my admin password without losing any data?
Select the correct OS X for help ....
OS X Yosemite: If you forget your login password
OS X Mavericks: If you forget your login password
OS X Mountain Lion: If you forget your login password
If nothing above helped, you may be able to reset your admin password using your Apple ID > OS X: Apple ID can be used to reset your user account password
No data should be lost due to resetting your admin password
You can try this one...
Change or reset a user account password on your Mac - Apple Support
I forgot my administrator password
