You may still browse the old posts here but much of the information is now out of date. To browse current answers or post a question, please go to the new forum.
I have successfully updated to mavericks and thank God my bootcamp partition is still active and untouched except for the fact that when you click to view the startup preference pane in mavericks, the only available startup disk for the computer is mavericks,10.9. I currently use a great utility called Bootchamp that allows me to boot into my windows 7 bootcamp partition the sam way apple's bootcamp control panel lets you boot into mac mode from within the windows OS. If i use this menu app,bootcamp boots successfully everytime. I still haven't tried the holding the option key at startup to set if windows pops up as an available startup disk,but im pretty confident it will since everything is fine on my windows side. I have the latest version of paragon NTFS driver as i have always used so i don't think its related to that. I think the mavericks update didn't update the GPT or MBR table correctly. Do you guys know exactly what's causing this error and do you know of a fix ???? i read online somewhere how you can run built in Gpt/MBR table tools from within the mac os x console. But they are vague and i don't want to mess around with them unless i know the exact procedure. But it seems that with just a few console commands you can rebuild the boot record and have everything be back in order. Are you familiar with this process??
here are the helpful commands to fix the GPT table: After using partition wizard to extend the windows partition, OSX disk utility will fail to mount the bootcamp partition. This happens because Minitool Partition Wizard only updates the MBR partition table after extending the windows partition, not the GUID partition table. Disk utility references the GPT and thus is "unaware" of the changes made to the MBR and can no longer mount bootcamp without it being reconciled with the MBR.
To fix, you can use the GDisk utility in OSX (download here http://sourceforge.net/projects/gptfdisk/ .Please read documentation carefully http://www.rodsbooks.com/gdisk/ ). I would first recommend backing up all your data (eg using time machine for OSX, windows backup utility for windows) then resync GPT to MBR table with GDisk- steps summarised below:
sudo gdisk /dev/disk0 (assuming disk0 is your drive containing both OSX and bootcamp) type '?' for options
choose 'b' to first backup your GPT table to a file (therefore can restore changes if something goes wrong) choose 'p' to print current GPT table and note down choose 'x' for extra functionality (experts only) choose 'o' to print MBR table details (write these down, especially the start and end sectors for the bootcamp partition - usually partition number 4, type 0x07) type 'm' to go back to main menu 'd' to delete bootcamp entry in the GPT (ie partition 4) 'n' to re-add bootcamp entry into the GPT using the correct starting and ending sectors printed from the MBR table above 'w' to write table to disk
Afterwards choose 'v' for GDisk to confirm both MBR and GPT are in sync 'q' to quit GDisk
