Q: Bootcamp gone haywire after Yosemite update
Hello
I recently updated my Macbook Pro to OS X Yosemite 10.10, and as a result, my bootcamp (Windows 7, 64-Home edition) is now gone.
I have tried to follow many of the discussions posted already but non seem to have a clear solution to my issue. I ve had no problem with Bootcamp before with the Lion and Maverick updates, but this time my guess is that the problem probably lies in the fact that I re-sized my partitions using a window software.
Basically the current situation is my Bootcamp no longer appears when I press Alt on start-up.
Upon checking my partition through Disk Utility, here is what I see:
So you see that not only Bootcamp is now changed into disk0s4, there is also a gap of hard drive space that is not used by either Mac or Windows.
I have tried the sudo MBR method but I always encounter errors despite I followed word for word on other discussions. I think they likely have a slight different situation than mine? Here is a sample of my Diskutil List: (I saw a guy with a fifth item listed as Basic Data Bootcamp, but I don't have that line...)
diskutil list
/dev/disk0
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *750.2 GB disk0
1: EFI EFI 209.7 MB disk0s1
2: Apple_CoreStorage 450.0 GB disk0s2
3: Apple_Boot Recovery HD 650.0 MB disk0s3
4: Microsoft Basic Data 200.8 GB disk0s4
/dev/disk1
#: TYPE NAME SIZE IDENTIFIER
0: Apple_HFS Macintosh HD *449.6 GB disk1
Logical Volume on disk0s2
D642C513-A4DB-4E81-9E67-546F88021205
Unlocked Encrypted
Thank you in advance for replies.
MacBook Pro, OS X Yosemite (10.10)
Posted on Oct 20, 2014 3:29 PM
Andy TLW wrote:
Sounds good. so how do I go from here?
Do I use this command? how do I input the correct numbers?
sudo gdisk /dev/disk0
p
d
4
n
4
86923264 880586752
538218489 1465147384
0700
p
w
y
Please see the changes. Reboot after this. Run the dd command and make sure you can see "R.NTFS" in the first line.
You should be able to see your Bootcamp volume and files in it.
If that works, recreate your Hybrid MBR using the steps in the referenced link. Please post back here, if you have questions, or you want me to paste it here.
Posted on Oct 28, 2014 4:40 PM








