Step 4: You will now be presented with an option to boot up your Mac using your connected USB drive. Press and hold the Option key as soon as you turn on the Mac. Step 3: With the bootable OS X Yosemite USB in hand and ready to go, plug it into your Mac and power it up. How To Create OS X Yosemite Bootable USB Flash Drive.Step 2: Once the download process is complete, you will now have to create a bootable OS X Yosemite USB drive, the steps for which are outlined here: Download OS X 10.10 Yosemite Final For Free Right Now!.Step 1: First and foremost, download OS X Yosemite from the Mac App Store it’s absolutely free. There are several routes you can take, but we suggest using an external hard drive to backup your files, which might include photos, videos, music, documents etc. Make a complete backup of your Mac on which you’re installing Yosemite.The full list of officially supported Macs is as follows: Make sure your Mac is supported by OS X Yosemite.When the new owner starts up the Mac, they can use their own information to complete setup. If you're selling, trading in, or giving away your Mac, press Command-Q to quit the assistant without completing setup. Your Mac might restart and show a progress bar several times, and the screen might be empty for minutes at a time.Īfter installation is complete, your Mac might restart to a setup assistant. Allow installation to complete without putting your Mac to sleep or closing its lid.If the installer offers you the choice between installing on Macintosh HD or Macintosh HD - Data, choose Macintosh HD.If the installer doesn't see your disk, or it says that it can't install on your computer or volume, you might need to erase your disk first.If the installer asks to unlock your disk, enter the password you use to log in to your Mac.To begin installation, select Reinstall macOS from the utilities window in macOS Recovery, then click Continue and follow the onscreen instructions.įollow these guidelines during installation: Reinstalling macOS does not remove data from your Mac.
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