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how can i get out from os x El Capitan

Hello I get a MacBook Air and I start a reset when I come to the step that I need to sign in I put my details and it says temporarily unavailable some one know how can I fix that or to get out from this beacause when I try to get out I need to choose a disk and I don't see any disk thank you.

If you purchased it second-hand then do the following:

 

How To Do A Factory Reset

 

Selection A should be used on computers that came with Lion or later when factory new. Selection B is for Macs that came originally with Snow Leopard or earlier.

 

A. Factory reset your Mac - Apple Support

 

B. Factory Reset Your Pre-Lion Mac

 

Follow these instructions until you get to Step 5: Factory reset 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 Disc or the Disc 1 that came with your computer.  Insert the disc 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 (un-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.

最后更新：2017-08-26 05:29:46

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