Q: Boot issues after installing Windows 10 via Bootcamp
This morning I installed Windows 10 via Bootcamp in El Capitan.
During the windows installation, the only thing I needed to do was format the "BOOTCAMP" drive, and I was able to complete the Windows 10 installation. After awhile I went back to boot into OSX. When I selected the drive, I received the circle with a diagonal line through it, and then the system booted back into Windows.
After that, I rebooted into Internet Recovery (CMD + R), and ran disk utility to repair both the OSX volume, and the entire disk. After doing this, and rebooting, I am getting a folder with a question mark. Both partitions are still visible in disk utility, so I'm quite confident that no data has been lost, but there doesn't seem to be an easy way to fix this, as no amount of "Repair Disk" clicking seems to be working.
I'm comfortable using the terminal, and have used gdisk on other installations before to repair broken windows partitions after a shoddy bootcamp install. Can I get some direction as to what I need to do next? Not being able to get in to either of my partitions does make this a bit harder -- will I have to download gdisk from another computer and mount the usb drive via the terminal?
Any help or advice going forward would be appreciated.
MacBook Pro (Retina, 15-inch, Late 2013), OS X El Capitan (10.11)
Posted on Oct 14, 2015 10:02 AM
mcarriere wrote:
I'm going to temporarily put this issue on hold. I ended up upgrading my external USB drive to El Capitan, which in turn didn't enable me to use gdisk anymore. Couldn't figure out how to do this without gdisk, and couldn't find out how get it running on El Capitan easily,
ELC has System Integrity Protection enabled by default. To disable it temporarily for diagnostics purposes, (this is the correct version of the nvram command you referenced earlier).
a. Boot into Local Recovery. Power down your Mac, power it back up, and hold the Command+R.
b. Run Utilities -> Terminal
c. Type csrutil disable
d. Exit Terminal
e. Reboot normally.
so I instead went forward with the DVD burning, and tried to do a wipe/install. Running the installation off of DVD caused the error where it stops at the end of the installation and says that it can't alter the boot configuration and fails.
I've lost an entire day of work over this, I'm going to put this issue to rest for the time being.
Thanks for the help. I may try a couple more things, and I'll post an update if I discover anything.
Inability to write the BCD can be due to several different issues. Run DU and Repair Disk when you are in Local Recovery for the previous set of steps. You can also boot in Mac Safe Mode and boot back normally which can fix underlying Disk Issues.
Posted on Oct 15, 2015 4:06 AM
