I have used transmac and win32diskimager and can not get 10.10.1 to boot it gets stuck once I select the flash drive as the boot drive. The only thing it shows is a flashing underscore "_" at the black screen. I can make mavericks boot into the installer and install it however Yosemite does not even boot into the installer. I already tried multiple times and redownloaded still will not work. I booted into Yosemite installer once the first time I tried it but after that it no longer boot into the installer even if I formatted everything.