dimanche 25 février 2018

How to Reset a MacBook Pro

This wikiHow teaches you how to reset your MacBook Pro's NVRAM and battery settings, as well as how to wipe your MacBook Pro and restore it to its factory settings. Resetting a Mac's NVRAM can help fix errors in things like your battery's display, while battery settings can be reset if your Mac is frequently overheating or crashing. Restoring your MacBook Pro to its factory settings will erase everything on the hard drive and reinstall the operating system.

EditSteps

EditResetting the NVRAM

  1. Understand what resetting NVRAM will fix. NVRAM—short for "Non-Volatile Random-Access Memory"—stores settings like speaker volume, the default display, and other settings that your Mac typically uses. Resetting the NVRAM can fix problems wherein your MacBook Pro isn't playing sound, the display is flickering or turning itself off, the computer is taking too long to start up, and similar problems.[1]
    Connect External Hard Drive to Macbook Pro Step 9.jpg
    • On some Macs, "NVRAM" is replaced with "PRAM" ("Parameter Random-Access Memory"), which is fundamentally similar to NVRAM.
  2. Open the Apple menu . Click the Apple logo in the top-left corner of the screen. A drop-down menu will appear.
    Reset a MacBook Pro Step 2 Version 4.jpg
  3. Click . It's at the bottom of the Apple menu.
    Reset a MacBook Pro Step 3 Version 4.jpg
  4. Click when prompted. Doing so prompts your MacBook Pro to shut down.
    Reset a MacBook Pro Step 4 Version 3.jpg
  5. Find the NVRAM reset keys. To reset NVRAM, you'll have to hold down the , , , and keys all at the same time for about 15 seconds.[2]
    Reset a MacBook Pro Step 5 Version 4.jpg
  6. Turn back on your Mac. Press the "Power" button on your Mac to prompt your Mac to begin turning back on.
    Turn On a Mac Computer Step 2.jpg
  7. Press and hold the NVRAM reset keys. Do this immediately after pressing your Mac's "Power" button; you'll need to be pressing all four keys at once before the Apple logo appears.
    Use a Laptop Effectively As a Student Step 8.jpg
    • If the Apple logo appears before you press the keys, you'll have to shut down and try again.
  8. Continue holding the keys until your Mac finishes starting up. Your Mac may reboot itself during this process. Once you arrive at the user selection screen, you can release the keys and sign into your MacBook Pro like you usually do.
    Type Quickly Step 9.jpg
    • You may need to reset some of your preferences (e.g., preferred audio output) after resetting the NVRAM.
  9. Verify that the problem has been resolved. If you are still having issues with the system settings, you may need to factory reset your MacBook Pro. You will lose any data that you have saved on the MacBook if you do so.
    Reset a MacBook Pro Step 9 Version 3.jpg

EditResetting the Battery

  1. Understand what resetting the battery will fix. To reset the battery, you'll actually reset the SMC (System Management Controller) which is a small chip that controls things like your Mac's external lights, responses to button presses, and battery management. Resetting the SMC may improve battery life, fix overheating problems, and speed up your MacBook Pro.[3]
    Make Your Laptop Last Longer Step 10 Version 3.jpg
  2. Check the symptoms. There are several symptoms that are directly related to the SMC:
    Clean a Laptop Keyboard Step 2 Version 2.jpg
    • The fans are loud and running at high speed even though the computer isn't hot and is well-ventilated.
    • Indicator lights (battery, backlights, etc.) are not working properly.
    • The MacBook doesn’t respond to pressing the Power button.
    • The computer shuts itself down or goes to sleep unexpectedly.
    • The battery does not charge properly.
  3. Open the Apple menu . Click the Apple logo in the upper-left side of the screen. Doing so prompts a drop-down menu.
    Reset a MacBook Pro Step 12 Version 4.jpg
  4. Click . It's at the bottom of the drop-down menu.
    Reset a MacBook Pro Step 13.jpg
  5. Click when prompted. Your MacBook Pro will shut down.
    Reset a MacBook Pro Step 14 Version 4.jpg
  6. Attach your MacBook Pro to a plugged-in charger. Make sure that the charger is plugged into a wall outlet, then plug the charging end into the port on the right side of your MacBook Pro.
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  7. Find the SMC reset keys. In order to reset the SMC, you'll need to hold down the , , and keys all at the same time while also holding down the "Power" button.
    Reset a MacBook Pro Step 16 Version 2.jpg
    • If your MacBook Pro has a touch bar, the "Power" button is also the Touch ID button.
  8. Press and hold the SMC reset keys for 10 seconds. Once you've done so, you can release the keys.
    Keep a Laptop Keyboard Clean Step 3.jpg
  9. Press the "Power" button. Doing so should turn on your Mac, prompting it to begin restarting. Once your Mac finishes restarting, your battery issues should be resolved.
    Clean a Laptop Keyboard Step 1 Version 2.jpg
  10. Verify that the problem has been resolved. If you are still having issues with the battery, you may need to factory reset your MacBook Pro. You will lose any data that you have saved on the MacBook if you do so.
    Reset a MacBook Pro Step 19 Version 2.jpg

EditRestoring Factory Settings

  1. Back up your Mac if possible. Since restoring your Mac to its factory settings will erase everything on your hard drive, it's a good idea to back up anything that you want to save before doing so.
    Reset a MacBook Pro Step 20 Version 4.jpg
    • If you can't log into your Mac or you're unable to run your Mac's Time Machine, skip this step.
  2. Open the Apple menu . Click the Apple logo in the top-left corner of the screen. A drop-down menu will appear.
    Reset a MacBook Pro Step 21 Version 2.jpg
  3. Click . It's near the bottom of the drop-down menu.
    Reset a MacBook Pro Step 22 Version 2.jpg
  4. Click when prompted. Doing so will cause your Mac to begin restarting itself.
    Reset a MacBook Pro Step 23 Version 2.jpg
  5. Hold down the and keys at the same time. You'll need to do this immediately after clicking Restart.
    Reset a MacBook Pro Step 24 Version 2.jpg
  6. Release the keys when you see the Apple logo. Your MacBook will begin booting into the Recovery window. This process can take a few minutes to complete.
    Turn on a Cellphone Step 3 Version 2.jpg
  7. Select . It's in the middle of the Recovery window.
    Reset a MacBook Pro Step 26 Version 4.jpg
  8. Click . This button is in the bottom-right corner of the window. Doing so opens the Disk Utility window.
    Reset a MacBook Pro Step 27 Version 2.jpg
  9. Select your Mac's hard drive. Click the Mac's hard drive's name in the upper-left side of the Disk Utility window.
    Reset a MacBook Pro Step 28 Version 4.jpg
    • Your Mac's hard drive will be named "Macintosh HD" if you didn't rename it.
  10. Click the tab. It's at the top of the Disk Utility window. A new window will open.
    Reset a MacBook Pro Step 29 Version 2.jpg
  11. Click the "Format" drop-down box. Doing so will open a drop-down menu.
    Reset a MacBook Pro Step 30 Version 2.jpg
  12. Click . It's in the drop-down menu.
    Reset a MacBook Pro Step 31 Version 4.jpg
    • This is the basic disk format used for Mac hard drives.
  13. Click . This button is in the bottom-right side of the window. Your Mac's hard drive will begin erasing itself.
    Reset a MacBook Pro Step 32 Version 3.jpg
    • The erasing process can take a few hours, so make sure that your Mac is plugged into a charger.
  14. Click when prompted. Your Mac should now be completely erased.
    Reset a MacBook Pro Step 33 Version 3.jpg
  15. Click . It's a menu item in the top-left corner of the screen. A drop-down menu will appear.
    Reset a MacBook Pro Step 34 Version 3.jpg
  16. Click . This option is at the bottom of the drop-down menu. Clicking it takes you back to the Recovery window.
    Reset a MacBook Pro Step 35 Version 3.jpg
  17. Select . It's in the Recovery window.
    Reset a MacBook Pro Step 36.jpg
  18. Click . This option is in the bottom-right corner of the window. MacOS will begin downloading onto your computer.
    Reset a MacBook Pro Step 37.jpg
    • You must have an Internet connection for MacOS to download onto your computer.
  19. Follow any on-screen prompts. Once MacOS finishes downloading, you'll be able to install and set up the operating system as though the Mac were brand-new.
    Reset a MacBook Pro Step 38.jpg

EditSources and Citations


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source How to of the Day http://ift.tt/2osNtrS

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