You said you used OS X to do the changes, which is good making such changes in Windows is almost certain to do serious damage to your partition table and leave the disk in an inconsistent state that can lead to ever-worsening problems. Note also that hybrid MBRs make such adjustments particularly tricky. These are both possibilities if you've been adjusting partitions. If you've damaged the Windows partition, it might no longer boot.
You can do this with gdisk (see the previous link) or with the gptsync tool that comes with rEFIt and rEFInd. The solution is simple: Create a fresh hybrid MBR. If resizing your partitions has damaged the hybrid MBR, or replaced it with a standard protective MBR, you'll be unable to boot in BIOS mode. You've damaged your hybrid MBR - Macs that dual-boot OS X and Windows 7 almost always use a hybrid MBR, which is an ugly and dangerous (see the next possibility) hack.It doesn't boot.Ĭhances are one of two things has happened:
Result: "No bootable device - insert boot disk and press any key"Ģ) after turning on the Mac pressing ALT-button (which should be equivalent to the Option-button on my Windows-Keyboard, right?)ģ) I tried to boot Knoppix from a USB-Stick. I did try to press Alt on startup (on a Windows-Keyboard) but nothing happens, I still end up receiving the above message.ġ) after turning on the Mac pressing x-button which should force booting into the OS X partition
"No bootable device - insert boot disk and press any key"
Now my Mac Mini won't start up anymore, I receive the error: I hoped that I could add those 100GB free space to the Win 7/Bootcamp partition. I was running out of disk space on my bootcamp Win 7 partition, so I switched to OS X and resized the OS X partition from 400GB to 300GB.
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