Q: Windows Boot Option Gone
Hi,
I'm using a mid 2012 Macbook Pro with Yosemite installed and have been running a Windows 8.1, now 10, partition on my computer for awhile. Usually I can boot into either OS by powering off and holding the option button, but suddenly the option to boot in Windows is gone. Since I'm not sure what exactly caused this and I'm having trouble understanding the solutions other people have had on here, I'm just going to list everything that happened in the hopes that I can get this fixed.
- I upgraded to Windows 10 a few days ago with no problems.
- I decided I wanted to use essentially only Windows on my Mac, so I started to try to resize the partitions which were 150GB for Windows and 350GB for Yosemite, give or take.
- I wasn't able to resize the core partition since Yosemite doesn't allow that without difficulty, so I first turned off FireVault and rebooted, which didn't seem to do anything at all. Then I updated Yosemite, which I have been neglecting for a couple of months. After the updates had finished, I was able to resize the core partition. I think turning off FireVault fixed this but I'm not sure.
- I then booted in Windows and moved all of my files over there and resized the partition using a third party tool, MiniTool Partition Wizard Home Edition.
- Then I booted back into the Mac partition and began deleting any other files I didn't need since I wouldn't be opening that partition very often. I could have deleted essential files to the system, but I really hope I wasn't that stupid.
- After I got the partition to about 60GB, I resized it again to give the Windows partition more room to resize.
- When I tried to boot into Windows, the option was gone, leaving just the Mac partition, EFI, and my flash drive.
- Going back into the Mac partition, I checked in Disk Utility and found everything looking very normal, with my Windows partition at about 80GB with ~100GB to spare. So I haven't deleted anything, I just can't open it.
I think that's all I need to say on this, I've tried messing around with terminal but I really have no idea what I'm doing there...
I can't just reinstall Windows because I will lose all my files, so there must be a way around this!
MacBook Pro with Retina display, OS X Yosemite (10.10.4)
Posted on Aug 10, 2015 8:04 PM
Are you able to see files in the Bootcamp volume that is currently visible in Finder? if yes, since this entry exists in both the GPT and the MBR, let us try the simple fix first. Please start a new Terminal windows and ignore the i386 MBR errors message but not any other errors.
sudo fdisk -e /dev/disk0
p
setpid 4
07
flag 4
p
w
y
Reboot and check if Windows will come up.
Posted on Aug 12, 2015 6:48 AM
