-
All replies
-
Helpful answers
-
Feb 23, 2015 12:26 PM in response to Samgotti18by Kappy,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.
Also see:
Reinstall OS X Without Erasing the Drive
Choose the version you have installed now:
OS X Mavericks- Reinstall OS X
OS X Mountain Lion- Reinstall OS X
Note: You will need an active Internet connection. I suggest using Ethernet
if possible because it is three times faster than wireless.
-
Feb 23, 2015 12:30 PM in response to Kappyby Samgotti18,Even when I do this, it just turns itself off again straight away.
-
Feb 23, 2015 12:41 PM in response to Samgotti18by Kappy,Then it's likely the hard drive has failed. To determine if that is the case you need to try reformatting the drive then reinstalling OS X. If Disk Utility cannot see the drive or reports an unfixable error, then the drive has most likely failed.
Install or Reinstall OS X from Scratch
Be sure you backup your files to an external drive or second internal drive because the following procedure will remove everything from the hard 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.
Erase the hard drive:
1. Select Disk Utility from the main menu and click on the Continue button.
2. After DU loads select your startup volume (usually Macintosh HD) from the
left side list. Click on the Erase tab in the DU main window.
3. Set the format type to Mac OS Extended (Journaled.) Optionally, click on
the Security button and set the Zero Data option to one-pass. Click on
the Erase button and wait until the process has completed.
4. Quit DU and return to the main menu.
Reinstall OS X: Select Reinstall OS X and click on the Install button.
Note: You will need an active Internet connection. I suggest using Ethernet if possible
because it is three times faster than wireless.
This should install the version of OS X that you had installed.
-
Feb 23, 2015 12:50 PM in response to Kappyby Samgotti18,Unfortunately it doesn't get to that point. Wether I press cmd + R or not, it shuts off seconds after I start it up.
-
-
Feb 23, 2015 1:33 PM in response to Kappyby Kappy,Before you do the above try this:
Intel-based Macs: Resetting the System Management Controller (SMC)
-
Feb 23, 2015 1:53 PM in response to Samgotti18by my ginger,Hi Have you tried single user mode? Or safe boot? http://support.apple.com/en-us/HT203176 I had one person try something a little different and it worked for them. If may or may not for you . But I will pass it along. You are going to do a SMC reset for macbook pro with batteries you cannot remove. You want to boot up holding down the Command/Option.Shift key and power button. Then before you release the power button switch to holding down the Option R or Command R keys.Then release the power button and press again. Keep the keys down.Till you get to a screen.