Hi Guys, Problem: Im trying to install windows 10. Since superdrive is failing, i change it to SSD. So installing Windows trough superdrive ODD/ the easy way (bootcamp) is not possible to install. My mac : Model no : A1312 iMac 27 i7 3.4ghz 8gb Ram (4+4) osX - El Capitan AMD Radeon HD 6970M (2gb) SSD - 256Gb [disk1] (change from superdrive slot) - El Capitan. HDD - 1Tb [disk0] (stock) - Data only, would like to install windows to this hdd. What i did : 1st try 1. I tried to install windows directly using partition made by BCA but my imac does not support any usb installation. So i change the plist and make a bootable usb installer without making any partition using bootcamp. 2. I manage to install windows 10 to the 1Tb HDD by wiping all data and use "command prompt" while on windows installer to change the MBR to GPT. 3. After installation complete, there are too many issue faced. OS is not running smoothly, ram cap at 2.5gb, No sound, bluetooth keyboard and mouse not working even though bootcamp driver has been installed. 2nd try 1. Wipe the whole 1Tb disk again to guid journaled. 2. Install daemon tool and mount the windows 10.iso and proceed with the original BCA and create a BOOTCAMP partition with it. 3. After the partitioning, iMac restarts but it only says "no bootable device" error. 4. Tried to boot up using the EFI bootable USB Windows 10 installer. however it wont let me install because need to change the MBR to GPT issue. Since changing it trough "cmd" will leads the same result as the first try, so i just exit the installer and go back to El Cap. 3rd try 1. Did not wipe the disk from previous try, i try using the virtualbox method as in this link : http://huguesval.com/blog/2012/02/installing-windows-7-on-a-mac-without-superdrive-with-virtualbox/ 2. After done all the procedures and cloning image to BOOTCAMP partition, i restart the machine but windows or bootcamp is not visible in my boot up list so i install rEFInd. 3. After rEFInd installed successfully trough mac recovery (to bypass SIP), windows shows up in rEFInd boot up menu as Windows (legacy). 4. When choosing Windows (legacy), the screen goes black. Only that there is a blinking cursor. I waited like for 30 mins but windows still not booting up. 4th try 1. I plugged back in the bootable USB Windows 10 installer and run with a few command as below : bootrec a. /fixmbr b. /fixboot c. /rebuildbcd 2. all commands are success. however after restarting the machine, the results are still the same. Blank screen with blinking cursor. 3. Reset PRAM SMC, i lost rEFInd boot menu but windows shows up on osX boot up menu. Tried to boot up but the results still the same. Blank and blinking cursor. 5th try 1. Boot up to El Cap 2. Open BCA and restore drive to single partition. 3. i thought this might be a Windows 10 issue, so i mount windows 7 in BCA and recreate BOOTCAMP partition. 4. Boot up El cap again. 5. Create a Windows 7 image using the same method as i did on the 3rd try. 6. Clone Windows 7 image to Bootcamp. 7. Restart 8. Windows did not show up in the boot up menu 9. boot into osX recovery, install rEFInd & restart 10. windows (legecy) shows up in the rEFInd menu, but when i try to boot it up, it still shows a blank screen with blinking cursor. I almost give up already.. Hope anyone in here can help me with this..