Once the Options window comes out, choose GUID Partition Table. The size should be set between 15 to 16 gb. For the format, choose Mac OS Extended (Journaled). You will be asked to provide a name for the said volume, which you can assign by yourself.
Choose your flash drive from the list provided on the left portion of the window.
Go to Applications on your Finder menu and open Disk Utility.You will need a USB flash drive that doesn’t have any data saved and with data capacity of 16 gb above.This bootable flash drive will serve as your handy solution to Mac emergencies. To save yourself from a lot of potential Mac problems, all you have to do is create a bootable Mac OS X flash drive which you can carry around so you can instantly diagnose and repair your computer. Nevertheless, they are not completely protected from some problems. Mac computers and Mac OS X make the most stable combination in the world of computers.
