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Mitesh Shah

Linux Enthusiast
System Administrator

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Clean Install of OS X Yosemite

Overview

Note!: A clean install will erase all the contents and partition on your disk drive. Make sure you take back up of your important files before proceeding.

Download OS X Yosemite

  • To do a clean install of OS X Yosemite, you’ll need a blank USB flash drive or External HDD that is at least 8GB in size.
  • You’ll also need to download OS X Yosemite onto your existing Mac.

  • Download OS X Yosemite from Apple Store. Clean Install of OS X

  • You will be prompted to continue download, Click on Continue Clean Install of OS X

  • Provide your Apple ID and Password and click on Sign In Clean Install of OS X

Erase USB/HDD Drive

  • Open Disk Utility Application and Select your USB/HDD drive and click on the “Erase” tab.
  • Select Mac OS Extended (Journaled) as the format type.
  • Click the Erase button. This will take a few minutes, but will erase your USB/HDD drive will be erased and format it with the proper file system. Clean Install of OS X

Bootable USB/HDD

Download DiskMaker X

Make Bootable USB/HDD Drive

  • Open DiskMaker X by pressing Command ⌘ and space Clean Install of OS X

  • Click on Yosemite(10.10) Clean Install of OS X

  • We already downloaded OS X Yosemite, So click on Use this copy Clean Install of OS X

  • Click on Another kind of disk Clean Install of OS X

  • Make sure you choose right USB/HDD (Will be formated) Clean Install of OS X

  • Make sure you selected right USB/HDD Clean Install of OS X

  • Next step provide administrator password, click on Continue Clean Install of OS X

  • Its take some time to format selected USB/HDD drive.
  • Provide administrator password and click on OK Clean Install of OS X

  • The installation may take a little time, so grab a cup of coffee and relax. Clean Install of OS X

  • We just make Bootable USB/HDD.

Boot from USB/HDD

  • Start Mac Book and hold the Alt/Option key on your keyboard as soon as you hear the Mac’s startup chime.
  • After a few seconds, you’ll see all of the bootable devices appear on your screen.




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