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.
- 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.
- Plug your USB flashdisk to your computer.
- Open Disk Utility app (from Applications -> Utilities folder).
- Select USB flashdisk that you wish bootable.
- Point to Erase tab.
- Select Mac OS Extended (Journaled)
- And then select Erase.
- To download OS X Yosemite;
- If you downloaded from App Store, then rename the Quit installer into Install OS X Yosemite.app.
- If you downlaoded from outside App Store, then copy the downlaoded file and paste into Applications folder and then extract the Yosemite file.
- Now launch Terminal, do so by going to Applications > Utilities folder.
- And then paste the following command line to it.
sudo /Applications/Install\ OS\ X\ Yosemite.app/Contents/Resources/createinstallmedia --volume /Volumes/Untitled --applicationpath /Applications/Install\ OS\ X\ Yosemite.app --nointeraction
- Wait till the bootable process is complete.