OK, I realize I'm committing sacrilege here. I would like to install Windows on my iMac (Yosemite). Uggh, I never thought it would come to this. But I need to run some CAD software at home, and none of them are written for OSX. Windows only. So I'm using bootcamp, an 8gig flash drive, and a Windows 7 disk to do it. I follow the instructions found online, and all goes well until Windows starts to install. I am instructed to chose which partition to put Windows on, and the correct partition is the 'bootcamp' partition. However, I get an error message which states that the partition has to be formatted 'NTSF', and i don't think that's possible. I haven't found the answer to this problem elsewhere. Anybody help me??