How To Create A Bootable USB OS X Yosemite (10.10)

The following is a guide to create a bootable USB OS X Yosemite (10.10) on iMac, Macbook, Macbook Pro, Mac Mini, MacBook Air, Mac Xserve.

You need to know about steps for creating a bootable USB OS X Yosemite if you are now using that operating system.

Why do you need a bootable USB installer to upgrade your existing OS X to Yosemite?

As we know that all Mavericks users can now upgrade to OS X 10.10 for free via App Store. But not all of them face a smooth upgrade process, some of them experienced performance issue when performing direct upgrade via App store or for other people.

Installing OS X could be their first time experience thus issues and problem will likely appear to them. To avoid that, we can undergo to more clean and fast installation method using Disk Utility by creating a bootable USB.
OS X Yosemite USB Installer
  • Please to firstly download OS X Yosemite 10.10 final via App Store.
  • Flashdisk (8GB minimal).
  • Make a necessary backup over your existing data like photos, videos, music files, documents and the like on your Mac to the external storage medias..

Steps / how to create a bootable USB OS X Yosemite.

  1. Plug your USB flashdisk to your computer.
  2. Open Disk Utility app (from Applications -> Utilities folder).
  3. Select USB flashdisk that you wish bootable.
  4. Point to Erase tab.
  5. Select Mac OS Extended (Journaled)
  6. And then select Erase.
    Create Bootable USB OS X Yosemite Now
  7. To download OS X Yosemite;
    • If you downloaded from App Store, then rename the Quit installer into Install OS X
    • If you downlaoded from outside App Store, then copy the downlaoded file and paste into Applications folder and then extract the Yosemite file.
    OS X Yosemite
  8. Now launch Terminal, do so by going to Applications > Utilities folder.
  9. And then paste the following command line to it.
    sudo /Applications/Install\ OS\ X\ --volume /Volumes/Untitled --applicationpath /Applications/Install\ OS\ X\ --nointeraction
    How To Crate A Bootable USB OS X Yosemite (10.10)
  10. Wait till the bootable process is complete.
    How To Crate A Bootable USB OS X Yosemite (10.10)
  11. Done!
After the process is complete, now the bootable USB OS X Yosemite installer is ready to be used. You can now perform a clean installation OS X Yosemite via bootable USB to your Mac computer.

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