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my computer will only start in Windows
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Fresh-Faced Recruit
Join Date: Dec 2007
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Last night I shut down my MacBook Pro after it installed the latest mac updates, and this morning when I turned it on, it will only start up in windows. Even if I hold alt/option when starting up, which brings up the options of which operating system I was to use, both the mac and windows choice bring me to windows. Does anyone have any idea of how to fix this?
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Moderator  Join Date: Jan 2001
Location: Polwaristan
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boot from your OS X install disc or Mac's restore disc, and run Disk Utility, both for disk errors and permissions.
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Fresh-Faced Recruit
Join Date: Dec 2007
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thanks for the help, but is there any other way to fix the problem without either disk? I'm at college and forgot both at home.
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Moderator Join Date: Jan 2001
Location: Polwaristan
Status:
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You could put your Mac into firewire target disk mode, connect it to another Mac, and run Disk Utility from the 2nd Mac to scan your Mac.
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Moderator Join Date: Oct 2001
Location: San Jose, CA
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What happens when you try to change it in the Boot Camp control panel (startup disk)?
Steve
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Celebrating 10 years and 4000 posts on MacNN!
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Forum Regular
Join Date: Dec 2005
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I wonder if you can boot into single-user mode and then use bless:
bless - Change the system's boot settings (the "blessed" system). Useful to switch back to OS 9 if OS X isn't bootable, and you don't want to juggle boot CDs.
Example:
bless -folder9 "/System Folder" -use9
Bless the OS-9 system folder named "System Folder" on the current (OS-X) boot volume, and make OS-9 the default for booting from this volume.
source: The PHP Kemist: OS X's Single-user mode Commands
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Moderator Join Date: Jan 2001
Location: Polwaristan
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Isn't that for OS 9 though?
Doesn't make sense to use for OS X.
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Professional Poster
Join Date: Sep 2002
Location: New York, NY
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Exactly. If you're in Single User Mode, you're already in OS X.
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Vandelay Industries
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Mac Elite
Join Date: Aug 2007
Status:
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Your OS X install may be corrupt and that's why Windows always boots, even though you select the OS X drive from option-boot. See if you can target-disk mode your computer to another mac and backup the data (if possible). If not, you may have to start clean and reinstall OS X.
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MacBook Pro 13" 2.8GHz Core i7/8GB RAM/750GB Hard Drive - Mac OS X 10.7.3
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Administrator  Join Date: Apr 2001
Location: San Antonio TX USA
Status:
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I want to know the answer to ibook_steve's question. If the Startup Disk Control Panel applet doesn't work to change the default boot OS, then there is definitely something wrong with the OS X installation-corruption of the boot record or something like that would be my guess.
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Glenn -----OTR/L, MOT, Tx
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Clinically Insane
Join Date: Dec 1999
Status:
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Try booting from your OS CD and repair the drive (not permissions.)
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"…I contend that we are both atheists. I just believe in one fewer god than
you do. When you understand why you dismiss all the other possible gods,
you will understand why I dismiss yours." - Stephen F. Roberts
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Administrator Join Date: Apr 2001
Location: San Antonio TX USA
Status:
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ole, he says he failed to pack his OS disc when he headed off to college...
I still want to know what, if anything, the Startup Disk applet in Windows does for him...
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Glenn -----OTR/L, MOT, Tx
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Forum Regular
Join Date: Dec 2005
Status:
Offline
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Fyi, I know that when you're in single-user mode you're in OS X...I was thinking command-s at boot might circumvent bootcamp, then from single-user mode in OS X, manually set OS X as the default. Guess not though.
Also, bless can be used to set OS X as the blessed directory using "--folder" instead of "--folder9".
(
Last edited by rem; Dec 18, 2007 at 09:08 PM.
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