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Mac OS X 10.9.3 - 2013 MacBook Pro (w/optical drive) - attempting Windows 7 install
- Downloaded the correct
.iso(X17-59465.iso) - Plugged in USB drive (500GB)
- Opened up Bootcamp
- Bootcamp gives me the option to make a bootable USB
- Great, so I choose that option
- I run bootcamp assistant which downloads the correct support files, creates the Windows partition on the HD, creates the bootable USB
- Bootcamp assistant finishes, tries to boot
- Black screen with error message: “No bootable devices.” No response from keyboard.
Restarting and holding the option key does not allow me to boot off of the USB. Bootcamp will only allow me to remove the Win partition and start over, but I feel like I’ll get the same results.
nuclearsalt
Posted 2014-06-03T15:40:28.087
Reputation: 81
But bootcamp assistant just formats it back to MBR after formatting it to GPT using disk util. – DWils – 2015-04-18T10:05:52.087
1What partition map scheme does Disk Utility show for your USB drive? If it's not "GUID Partition Table" (GPT), that's your problem. – Spiff – 2014-06-03T18:21:40.190
So the USB has to be GPT? I may have formatted it for MBR, assuming that Windows would need it to be in that format for it to install. I ended up using a DVD instead, which worked. – nuclearsalt – 2014-06-17T20:47:21.547
Yes, the Mac EFI ROMs only know how to boot off of a GPT-formatted drive. – Spiff – 2014-06-17T21:56:23.120
I just realized that my Bootcamp partition is also GPT (because the whole disk has to be). That makes sense now! Thank you! I was under the impression somehow that Windows had to be installed on an MBR formatted drive. – nuclearsalt – 2014-06-17T23:05:58.817