How to make a bootable install of Mavericks on Flash USB Drive?This is better than osxdaily's method (which should only be used for DP1 anyway, not DP4 or the GM): To make a bootable USB of the GM, use this method: Your 8 GB USB drive should be called Untitled and formatted as Mac OS Extended (Journaled). The installer should be called Install OS X Mavericks.app and should be in your Applications folder. Run this in terminal and wait about 20 minutes: sudo /A
