Help! I accidently delete OpenDirectory.framework . How to put back ?? HELP

If the computer is functional, run the relevant combo update to reinstall that operating system component*:

http://www.macmaps.com/jaguar_and_up.html

If it isn't functional, you may have to use the tools to restore the operating system, or use the original installer discs. Not knowing which MacBook Pro you have makes it hard to determine how much of a struggle it is. This tip should you determine that:

http://discussions.apple.com/docs/DOC-6413

* Links to my pages may give me compensation.

I can't help while it is loading. Either wait, or shut it down and then read the serial number from the underside and use my tip to identify how old the Mac is it, and what part of the year it was produced (i.e. early 2008, or mid-2009, etc...). Knowing those facts, will help us know how to recover the file in question.

DO NOT PUBLISH YOUR SERIAL NUMBER ON THIS BOARD! IT IS THE KEY TO YOUR WARRANTY AND PERSONAL INFORMATION.

How to find your serial number:

http://support.apple.com/kb/HT1349

Plug your serial number in at this link:

https://selfsolve.apple.com/agreementWarrantyDynamic.do

Tell us the early, mid, or late, and year of your model.

Not if you follow my directions exactly.

1. Get an external hard drive with nothing on it.

2. Use Command-R to install the base operating system to the external hard drive.

3. Use Apple menu -> System Preferences -> Startup Disk to determine what operating system is on your internal hard drive.

Answer that question, and then we can proceed to the next step.

No, it will just mean that you will need to repair the directory if you don't wait.

Which brings me up to another method.

Boot with command-S (command also has the cloverleaf or Apple logo on the key, or the Windows logo key may sometimes work on a wired keyboard, though ideally you should have an Apple, MacAlly, or Logitech keyboard with the Apple logo on it).

Note the Darwin version, and match up with the Mac OS X version on this table:

You should tell us your Mac OS X version as it applies to the Darwin version above, and repair the directory using this method:

At the prompt type:

/sbin/fsck -fy

Followed by return key. Repeat running /sbin/fsck -fy followed by return key until the system says it is repaired. If it tells you it can't repair it, then

get Alsoft Disk Warrior. If it can repair it, type:

/sbin/mount -uw

We can then tell you the best method to restore the file itself.