how to create a bootable usb key for yosemite
Hi,
I am for now using a MBP ssd 250 G (end 2011)with mountain lion OS 10.8.5.
Since i am planning to upgrade to yosemite i would like to know how to create a bootable usb disk with yosemite in order to install it.
Thank you.
JM
MacBook Pro, OS X Mountain Lion (10.8.5)