i deleted my administrator account and now i cant login to make any changes

I'm a new apple owner and I scrambled my admin account whilst trying to give it a different name. Please tell me what you mean by "registration details"?

So if yu go to System Preferences/Users & Groups do you see the "+" icon at the bottom of the page? If so, click on it, and create a new Admin account. Are you listed as the Admin on your account?

OK this will work (found at numerous web sites) tried on Lion.

Note this procedure will make the mac think it is being booted for the first time. You will need to enter in your registration information again. This procedure will create a new admin account, you will supply the information for the name of the account. Do not use the name from an existing account.

Boot into single user mode:

1. Reboot
2. Hold comand + s down after you hear the chime.

You will see a black screen and a bunch or writing scroll past. Then you will get the single user prompt. When you get text prompt enter in these terminal commands. Type return after each line

• mount -uw /
• rm /var/db/.AppleSetupDone
• shutdown -h now

Now reboot the machine, enter the registration and dummy account information. Ignore the system setup screen and then using System Preferences->Users & Groups set up the accounts

good luck

This solved my question. It also saved a lot of time on my can with this post. Thanks!

TThank You, Thank You, Thank You!!!! Just followed your directions after countless hours of trying to figure this out on my own (after upgrading to Yosemite), and thrilled to say ~ it worked!!

This definitely has helped me! Thanks a bunch!

Thank you very much Frank, your post saved me a lot of stress. THANK YOU.

Thank you!!! it help to me. How to recover information from old account? I mean files, photos, application, and saved password? Please