I am using macbook pro 13 mid 2012. I replaced 500gb HDD by 120gb SSD and moved HDD to optical drive place. Now there are two hard drive in my mbp and no optical drive. I tried many times but I couldn't install win 7 on HDD without an optical drive. I used usb to boot win 7 but until the stage of choosing partition to install, it always showed " window cannot support booting from this disk..." . I also tried using Winclone but after restoring It still couldn't boot from the window partition which I'd just used winclone to restore win 7 in. ( just a black screen appeared after holding option key and choosing window instead of mac) Anyone can help me? Thanks.