Launch the Terminal app (in Applications/Utilities) and type or paste the following command in, and then hit Enter:.After downloading the OS X 10.10 Yosemite instakker from the Mac App Store, just quit the installer and set the downloaded file's name to Install OS X Yosemite.app.Click on Option and ensure GUID Partition Table is selected as the partition scheme, with its name set to Untitled. Then choose Partition tab and select 1 Partition from Partition Layout dropdown menu.

Now click on Erase button and wait until the format process completes.Choose Mac OS Extended (Journaled) in the format box and let the name be Untitled (default).Select the USB drive from the left sidebar and click on Erase tab.Plug in your USB drive into the computer and open Disk Utility (in Applications).Here is how you do it, courtesy of Redmond Pie: You can do this by using the Time Machine feature in Mac OS X, or third-party software such as Carbon Copy Cloner.Ĭ) Create a bootable USB flash drive with a storage size of at least 8GB.ĭ) Download OS X 10.10 Yosemite Final from the Mac App Store and save it to the Applications folder – its default location.įirst, create bootable USB flash drive. MacBook (Late 2008 Aluminium, or Early 2009 or newer)ī) Back up important data and settings (photos, videos, music files, documents and the like) on your Mac to an external hard drive.Those who are facing performance issues with direct upgrade via App store or installing OS X for the first time on their Macs can follow a simple step-by-step guide to perform a clean install of Yosemite using Disk Utility.īefore we delve into the detailed process of clean installing OS X Yosemite on Macs, there are a few things that need to be taken care of.Ī) Ensure your Mac is compatible with OS X Yosemite. Mac OS users who are already running Mavericks on their desktop computers are now eligible for free upgrade to OS X 10.10 – Yosemite.

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