I'd like to start from scratch with Yosemite. I have Mavericks running on my iMac now but I'd like to just wipe the system and start with a clean Yosemite install.
How do I do a clean install of Yosemite on my machine, not an upgrade install?
MacOS – How to do a clean install of Yosemite
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Best Answer
I downloaded the OS X Yosemite GM from the App Store. Quit the installer that pops up with out installing and made a bootable flash drive with it on it. Used the following command below just change the paths to fit your need.
Then booted the computer to the usb flash drive and wiped the previous partitions using Disk Utility.app and installed a fresh copy.