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Mike
Mike, Mac Medic
Category: Mac
Satisfied Customers: 8694
Experience:  Over 20 years IT experience with Apple computers in publishing, marketing and design.
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My name is ***** ***** and i locked my hard disc and had to

Customer Question

Customer: my name is ***** ***** and i locked my hard disc and had to erase and re-install OS X but the computer is really slow and disc utility does not help
JA: Thanks. Can you give me any more details about your issue?
Customer: i found some unlock code which i typed into single user mode before i erased the disc and the machine is really slow and the spinning ball appears regular
JA: OK got it. Last thing — JustAnswer charges a fee (generally around $36) to post your type of question to Mac Experts (you only pay if satisfied). There are a couple customers ahead of you. Are you willing to wait a bit?
Customer: yes
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Submitted: 11 months ago.
Category: Mac
Expert:  Mike replied 11 months ago.

Please go to the Apple logo at the upper left of your computer screen to About This Mac and give me this information:

  • The exact system Version (listed right under Mac OS X)
  • Processor
  • Memory
Customer: replied 11 months ago.
2.66 GHz Intel Core i5
4 GB 1067 MHz DDR3
OSX El Capitan 10.11.2
Expert:  Mike replied 11 months ago.

What model Mac is that?

Customer: replied 11 months ago.
Mike
ita a 27" late 2009
Expert:  Mike replied 11 months ago.

iMac or laptop?

Expert:  Mike replied 11 months ago.

Are you there?

Expert:  Mike replied 11 months ago.

Depending on the Mac model follow one of these procedures:

Resetting the SMC & PRAM for Mac Pro, Intel-based iMac, Intel-based Mac mini, or Intel-based Xserve
1. Shut down the computer.
2. Unplug the computer's power cord.
3. Wait fifteen seconds.
4. Attach the computer's power cord.
5. Wait five seconds, then press the power button to turn on the computer.
6. Press and hold the Command-Option-P-R keys before the gray screen appears.
7. Hold the keys down until the computer restarts again at least twice.
8. Release the keys.
OK try this, it is posted as an Answer because of site rules, but if it does not work please Reply to Expert so we can try other procedures:

Resetting the SMC & PRAM on portables with a battery you should not remove on your own
1. Shut down the computer.
2. Plug in the power adapter to a power source, connecting it to the Mac if its not already connected.
3. On the built-in keyboard, press the (left side) Shift-Control-Option keys and the power button at the same time.
4. Release all the keys and the power button at the same time.
5. Press the power button to turn on the computer.
6. Press and hold the Command-Option-P-R keys before the gray screen appears.
7. Hold the keys down until the computer restarts again at least twice.
8. Release the keys.

Then boot to Recovery HD again by restarting and holding the Command - R keys. Select Disk Utility then select Macintosh HD and the Erase tab the erase the drive again. Quit Disk Utility and reinstall Mac OS X.

Customer: replied 11 months ago.
sorry mike
its an iMac
Customer: replied 11 months ago.
also i tried disc utility again but got message disc could not be completely verified or repaired
Expert:  Mike replied 11 months ago.

You are supposed to Erase it not Verify it??

Expert:  Mike replied 11 months ago.

1. Shut down the computer.
2. Unplug the computer's power cord.
3. Wait fifteen seconds.
4. Attach the computer's power cord.
5. Wait five seconds, then press the power button to turn on the computer.
6. Press and hold the Command-Option-P-R keys before the gray screen appears.
7. Hold the keys down until the computer restarts again at least twice.
8. Release the keys.

Then boot to Recovery HD again by restarting and holding the Command - R keys. Select Disk Utility then select Macintosh HD and the Erase tab the erase the drive again. Quit Disk Utility and reinstall Mac OS X.

Customer: replied 11 months ago.
Problem solved
Hopefully won't make same mistake again
Thanks very. Much Mike
Expert:  Mike replied 11 months ago.

Great!! If you are satisfied, please kindly provide an OK or Above Rating - so I get paid. Please remember we only get a portion of the original amount you pay no matter how long it takes, so bonuses are GREATLY appreciated. Keep in mind you can always come back to this page at any time regarding this question. Thanks!!