I've just finished replacing imac 10,1 HDD due to smart failure. I've replaced the drive with a 2TB one formatted in FAT32. I've booted my mavericks installer USB, but it's saying the drive needs to be formatted in GUIP or something. Is there a bootable option or some bootable freeware I can install in order to change the format/fat of the drive so I can continue the mavericks install? Please help ASAP! thanks!