Dan Frakes (@DanFrakes), previously of MacWorld fame, provides easy to follow instructions on how to create a bootable OS X 10.10 Yosemite installer USB drive on his personal blog. I’ve always done this and I recommend you do too.

Link: How to make a bootable OS X 10.10 Yosemite installer drive

Yep, mine is a R2D2 8GB USB Drive (called a Star Wars MIMOBOT) I found at the checkout at Kinokuniya in New York several years ago.

Follow the author as @hiltmon on Twitter.