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13inch Retina Mid 2014, how do I erase hd 10.10.2 version with 8gb memory and 2.6 GHz i5 ? please help.

I am having trouble figuring out how to erase my mac hd, I have time machined everything over to a external hd and now I'm looking to completely refresh the hd from its files. please help (descriptive feedback will be greatly appreciated) thanks to anyone taking the time.

MacBook Pro (Retina, 13-inch, Mid 2014), OS X Yosemite (10.10.2)

Posted on Apr 27, 2015 7:22 PM

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Question marked as Best reply

Posted on May 11, 2015 9:08 AM

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.

2 replies
Question marked as Best reply

May 11, 2015 9:08 AM in response to Alkrolly14

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.

13inch Retina Mid 2014, how do I erase hd 10.10.2 version with 8gb memory and 2.6 GHz i5 ? please help.

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