no bootable device insert boot disk and press any key

• Use a USB2 Flash drive and get the W7 drivers appropriate for your Mac from Install Windows 7 on your Mac using Boot Camp - Apple Support using the Download option of BC Assistant. USB3 will not work.
• Disconnect the USB, insert the W7 DVD and choose the Install option, which will partition your internal disk and start the Windows installer. Look at steps 20 and 21 in the link.
• Post any error messages.

Are you using the built-in Optical drive (CD/DVD drive)?

Is your built-in Optical drive fully functional?

Rebuild MBR to match the new GPT information thus resetting the Hybrid MBR. Use defaults for other questions (like partition codes). The only values that need modifications are the Boot flags and step 10. Accept all other defaults that Gdisk offers. Please see thesample Q&A as an example. These steps can be repeated if you make a mistake before you get to Step 12, otherwise start from Step 1 for these steps. Step 6 has numbers which are typed with a space between the numbers. Please see the sample Q&A before you execute these steps.

1. Sudo gdisk /dev/rdisk0
2. P (Print list of parts)
3. R (Recover)
4. O (print current Hybrid MBR)
5. H (chooses Hybrid)
6. Partitions numbers to be hybridized: 2 3 4
7. Y (Good for GRUB question)
8. N (part 2 boot flag)
9. N (part 3 boot flag)
10. Y (part 4 boot flag make NTFS bootable partition)
11. O (print current Hybrid MBR)
12. W (Write the new MBR)
13. Y (Yes! write the new MBR)
14. Reboot

Here is sample Q&A for this section. Please notice the Press Enter/Return.

Place EFI GPT (0xEE) partition first in MBR (good for GRUB)? (Y/N): Y

Creating entry for GPT partition #2 (MBR partition #2)

Enter an MBR hex code (default AF): Press Enter/Return

Set the bootable flag? (Y/N): N

Creating entry for GPT partition #3 (MBR partition #3)

Enter an MBR hex code (default AB): Press Enter/Return

Set the bootable flag? (Y/N): N

Creating entry for GPT partition #4 (MBR partition #4)

Enter an MBR hex code (default 07): Press Enter/Return

Set the bootable flag? (Y/N): Y

Once the MBR has been created, insert your DVD, reboot and hold Alt/Option. In Apple Bootmanager, select the Windows icon from the W7 DVD and follow the steps. Post any error messages you see.

ahmed_abbasy wrote:

its say that this disk is gpt style

You will need to install GPT Fdisk, so we can create a MBR. Can you post the output of

diskutil list

Do not remove the BC partition.