Mac blocked...very stupid man...I...

[Zioraffa]

Guys I urgently need help ... This morning I very casually opened the mac, click the disk icon, and get information at the bottom where you've enabled access authorization by everyone: no access. I thought he was referring to all users except the administrator, but it is not. Now the Mac will not boot up, the gray screen with spinning wheel. I tried to start by holding cmd + alt + P, but nothing, I tried to hold capital but after loading a gray bar remains gray screen with apple logo and nothing wheel. I DO .... Is there a way to enter the administrator password? Possible that this setting is like a self-destruct button? Thanks to anyone who can help me .... I forgot that I have a MacBookPro 2009 and the OS is Maverick ....

 

Sorry for the bad English i have used an online service of translation, i write from Italy.

 

Thanks

[Gary_GW]

Try this, worked on previous revisions.
 

Tricking your Mac into creating a new user account

1.            Power on or restart your Mac (should work for any Mac OS X system).

2.            At the chime (or grey screen if your chime is turned off), hold down Command+S on your keyboard to enter single-user mode.

3.            This step is optional, but it’s a good idea because it checks the consistency of the hard disk before moving on. At the prompt, type fsck -fy and press Enter/Return. Wait for the checks to complete before going to the next step.

4.            Type mount -uw / and press Enter.

5.            Type rm /var/db/.AppleSetupDone and press Enter.

Type shutdown -h now and press Enter.

 

Create a new account using different info as previously done.

As soon as you have restarted follow the following steps;

Click apple, System Preferences,