MacBook Pro won't load after login

Reinstalling OS X Without Erasing the Drive

Boot to the Recovery HD: Restart the computer and after the chime press and hold down the COMMAND and R keys until the menu screen appears. Alternatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.

Reinstalling OS X Without Erasing the Drive

Repair the Hard Drive and Permissions: Upon startup select Disk Utility from the main menu. Repair the Hard Drive and Permissions as follows.

When the recovery menu appears select Disk Utility and press the Continue button. After Disk Utility loads select the Macintosh HD entry from the the left side list. Click on the First Aid tab, then click on the Repair Disk button. If Disk Utility reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit Disk Utility and return to the main menu.

Reinstall OS X: Select Reinstall OS X and click on the Continue button.

Note: You will need an active Internet connection. I suggest using Ethernet if possible because it is three times faster than wireless.

2011 MacBook Pro Repair Extension Program for Video Issues

Please restart your computer in Safe mode by taking these steps:

- Click on the Apple sign() at the upper left corner of the Desktop, select 'Shut down' from a drop-down menu;

- Wait until your computer turns off, then press the Power button(⌽);

- Immediately after you hear the startup tone, press and hold the Shift(⇧) key. It should be held as soon as possible after the startup tone, but not before the tone;

- Release the Shift(⇧) key when you see a grey Apple sign() and the progress bar below;

This will force the system to perform several maintenance routines and load essential system software.

Once you've seen the Desktop, start a Disk Utility scan to detect and repair file system errors:

- Open Disk Utility application:

1. Click on Finder at the bottom of your Desktop;

2. Select Applications folder from Finder's left sidebar and then open Utilities folder (or press Command(⌘)-Shift(⇧)-U), double-click on Disk Utility icon;

- Choose your main hard drive from the left sidebar ('Macintosh HD', usually);

- Click on 'Verify Disc' at the bottom right corner, your Mac will perform a diagnostic test. Click on 'Repair Disk' if prompted to fix problems, or follow instructions given on the Disk Utility window;

- Once the routine finished, click on ""Verify Disc Permissions"", after it's done, click on 'Repair Disc Permissions';

- Wait until the process's finished and shut down your Mac, turn it back on in 30 seconds;