Select your hard drive from the list on the left and click on the Erase tab.
Depending on your Internet connection, this may take anywhere from a couple of minutes to up to an hour, or longer.
Related: How to start up your Mac in Recovery Mode.3 in the next step, a Wi-Fi menu appears.Important : A clean install of Oosemite requires formatting the Mac hard drive, meaning all contents on the disk will be removed and erased.As a bonus, Internet Recovery will automatically run a quick test of the Macs memory and disks to check for hardware issues.If your Mac is one of the models listed below, or older, you may upgrade it to use Onternet Recovery by downloading and installing an updated EFI Firmware ROM : MacBook Pro (13-inch, Early 2011) MacBook Pro (15-inch, Early 2011) MacBook Pro (17-inch, Early 2011).
To enter this mode at any time, do the following: 1 in the, apple menu, choose, restart or power on your Mac.
Choose the newly formatted disk, enter your Apple ID and password when prompted and wait for the installation to complete.
Creating a bootable copy of the OS X installer on a USB thumb drive is highly recommended: you can use it to install OS X on multiple Macs without needing to re-download the installer on each machine.Related: How to select your Macs startup acer travelmate 6292 drivers windows xp disk at boot time And last but not least, some drive partition configurations can result in OS Xs installer reporting that it cannot create a recovery partition for Recovery Mode.You cannot reinstall OS X over a Wi-Fi or Ethernet network norton ghost 9 ita.iso that uses the following authentication protocols: WEP WPA-Enterprise Certificate-based authentication / 802.1x Proxies (where specific proxy servers must be configured in network preferences) Captive Wi-Fi networks (where you click an Agree button to access.Check out our guide on how to make an OS X recovery USB drive if youd like to recover OS X using a flash drive instead.Enter a new name for your hard drive and format it as Mac OS Extended (Journaled).Click the menu to display the available Wi-Fi networks, and then select one to connect.Close Disk Utility and proceed to install Yosemite.Attach the, oosemite bootable installer drive to the Mac, then reboot as normal.