2 Replies Latest reply: Nov 21, 2012 11:37 AM by Kappy
FreedomNow12 Level 1 Level 1

I have a Mac Pro Intel computer and I want to install the original Os on a new internal hard drive already installed.  I've tried looking this up online, there pleanty of advise on installing new OS on new hard drive for a laptop, but few instructions for the Pro Mac desktop.  I want to do it right and have a successful installion.  Thank you.

Mac Pro, Mac OS X (10.6.8)
  • mende1 Level 10 Level 10

    Welcome to the Apple Support Communities


    That's the same. Insert the Mac OS X disc, press C key when your Mac starts and install Mac OS X. If the drive isn't formatted, open Utilities > Disk Utility and format the disk with Mac OS Extended (Journaled)

  • Kappy Level 10 Level 10

    Drive Preparation


    1. Open Disk Utility in your Utilities folder.


    2. After DU loads select your hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. Note the SMART status of the drive in DU's status area.  If it does not say "Verified" then the drive is failing or has failed and will need replacing.  SMART info will not be reported  on external drives. Otherwise, click on the Partition tab in the DU main window.


    3. Under the Volume Scheme heading set the number of partitions from the drop down menu to one. Click on the Options button, set the partition scheme to GUID then click on the OK button. Set the format type to Mac OS Extended (Journaled.) Click on the Partition button and wait until the process has completed.


    4. Select the volume you just created (this is the sub-entry under the drive entry) from the left side list. Click on the Erase tab in the DU main window.


    5. Set the format type to Mac OS Extended (Journaled.) Click on the Security button, check the button for Zero Data and click on OK to return to the Erase window.


    6. Click on the Erase button. The format process can take up to several hours depending upon the drive size.


    7. After formatting is complete quit DU. Boot from your original installer disc to install OS X. Be sure you select the new drive as the target for the installation.