I made the mistake of making two accounts- admin account and standard account after upgrading to Yosemite beta 10.10.1. (The reason? I read that it would be "preferable" to set this up because of the security flaw which still has not been addressed, but that's another issue).
When I login, I first have to login with my admin account & password. Then another screen comes up with both the admin account and the standard account and a black rectangular shape at the left-hand side of the bottom the page which tells me to login. A white rectangle outline is on both the standard account image and the password section. I then enter my apple ID password into that white outlined rectangle. This is how I get into my computer. (I had many many other problems from Yosemite which I have remedied slowly)
BUT the problem is:
I have locked myself out of the admin account somehow. The admin password I login with, does not work anywhere else. For instance it does not unlock anything that requires to unlock the padlock - such as System Preferences.
- I cannot access Disk Utility, cannot unlock or put in my admin password.
- I cannot turn FileVault off or the Firewall
- I cannot upgrade software that requires admin password.
What can I do to regain admin access? (I cannot do this in System Preferences because I am locked out). Do I have to reset my default keychain? What do I need to do?