You can make a difference in the Apple Support Community!

When you sign up with your Apple Account, you can provide valuable feedback to other community members by upvoting helpful replies and User Tips.

Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.

Macintosh HD missing? Cannot reinstall O SX

I was preparing to sell my old MacBook Air and restore it to factory settings. So I clicked on Mactintosh HD and clicked erase to clear all my data. Now the disk is completely missing. Now I can't reinstall O SX because there is no disk to install it to. How can I get this fixed?

Posted on May 30, 2020 8:14 PM

Reply
Question marked as Top-ranking reply

Posted on May 30, 2020 8:22 PM

How To Do A Factory Reset


Selection A should be used on computers that came with Lion or later when factory new. These models had no disks included when new. Selection B is for Macs that came originally with Snow Leopard or earlier. These models shipped with Software Restore disks when new.


A. Factory reset of your Mac - Apple Support

B. Factory Reset Your Pre-Lion Mac Follow these instructions until you get to Step 6 of Factory reset of your Mac - Apple Support. At Step 5 you will need a Snow Leopard DVD or the installer disc that came with the computer.


  1. Boot the computer using the Snow Leopard Installer Disk or the Disk 1 that came with your computer.  Insert the disk into the optical drive and restart the computer. After the chime press and hold down the  "C" key.  Release the key when you see a small spinning gear appear below the dark gray Apple logo.
  2. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Utilities' menu. After Disk Utility loads select the hard drive entry from the left side list (out-dented entry - mfgr.'s ID and drive size.)  Click on the Partition tab in the Disk Utility main window.  Set the number of partitions to one (1) from the Partitions drop down menu, click on Options button and select GUID, click on OK, then set the format type to MacOS Extended (Journaled), then click on the Apply button.
  3. When the formatting has finished quit Disk Utility.  Proceed with the OS X installation and follow the directions included with the installer.
  4. If you are planning to sell or give your computer away, then do the following: After you reformat your hard drive and reinstall OS X, the computer restarts to a Welcome screen and asks you to choose a country or region. If you want to leave the Mac in an out-of-box state, don't continue with the setup of the system. Instead, press Command-Q to shut down the Mac. When the new owner turns on the Mac, the Setup Assistant will guide them through the setup process.


1 reply
Question marked as Top-ranking reply

May 30, 2020 8:22 PM in response to natalietento

How To Do A Factory Reset


Selection A should be used on computers that came with Lion or later when factory new. These models had no disks included when new. Selection B is for Macs that came originally with Snow Leopard or earlier. These models shipped with Software Restore disks when new.


A. Factory reset of your Mac - Apple Support

B. Factory Reset Your Pre-Lion Mac Follow these instructions until you get to Step 6 of Factory reset of your Mac - Apple Support. At Step 5 you will need a Snow Leopard DVD or the installer disc that came with the computer.


  1. Boot the computer using the Snow Leopard Installer Disk or the Disk 1 that came with your computer.  Insert the disk into the optical drive and restart the computer. After the chime press and hold down the  "C" key.  Release the key when you see a small spinning gear appear below the dark gray Apple logo.
  2. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Utilities' menu. After Disk Utility loads select the hard drive entry from the left side list (out-dented entry - mfgr.'s ID and drive size.)  Click on the Partition tab in the Disk Utility main window.  Set the number of partitions to one (1) from the Partitions drop down menu, click on Options button and select GUID, click on OK, then set the format type to MacOS Extended (Journaled), then click on the Apply button.
  3. When the formatting has finished quit Disk Utility.  Proceed with the OS X installation and follow the directions included with the installer.
  4. If you are planning to sell or give your computer away, then do the following: After you reformat your hard drive and reinstall OS X, the computer restarts to a Welcome screen and asks you to choose a country or region. If you want to leave the Mac in an out-of-box state, don't continue with the setup of the system. Instead, press Command-Q to shut down the Mac. When the new owner turns on the Mac, the Setup Assistant will guide them through the setup process.


Macintosh HD missing? Cannot reinstall O SX

Welcome to Apple Support Community
A forum where Apple customers help each other with their products. Get started with your Apple Account.