Bootcamp won't create a USB drive for Windows 10, 64 bit
Today I downloaded Windows 10. I've never run Windows on my Macbook Pro (retina, late 2013). When I try to use bootcamp (5.1.2) to install/make the USB drive, I receive this error: "Boot Camp only supports Windows 7 or later installation on this platform. Please use an ISO file for Windows 7 or later installation."
I have been looking all over google for ~5 hours, and have tried everything I can think of. I've redownloaded windows 10, unmounted, tried both USB drives, but I keep getting the same error.
Help?!
MacBook Pro with Retina display, OS X Mavericks (10.9.5)