Unable to install Windows via Boot Camp - Unable to Partition I am unable to proceed beyond the initial screens of Boot Camp in order to install Windows 10.  I am told the:

The startup disk cannot be partitioned or restored to a single partition.

Upon checking I only have a single partition, my OS X partition, as per the screenshot below.

If I dismiss that prompt there is no way to proceed with an installation.  So, how do I install Windows 10?



Output of: sudo fdisk /dev/disk0

Disk: /dev/disk0    geometry: 19457/255/63 [312581808 sectors]
Signature: 0xAA55
         Starting       Ending
 #: id  cyl  hd sec -  cyl  hd sec [     start -       size]
------------------------------------------------------------------------
 1: EE 1023 254  63 - 1023 254  63 [         1 -  312581807] &lt;Unknown ID&gt;
 2: 00    0   0   0 -    0   0   0 [         0 -          0] unused      
 3: 00    0   0   0 -    0   0   0 [         0 -          0] unused      
 4: 00    0   0   0 -    0   0   0 [         0 -          0] unused      


And output of sudo gpt -r show /dev/disk0

      start       size  index  contents
          0          1         PMBR
          1          1         Pri GPT header
          2         32         Pri GPT table
         34          6         
         40     409600      1  GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B
     409640  311909984      2  GPT part - 48465300-0000-11AA-AA11-00306543ECAC
  312319624     262151         
  312581775         32         Sec GPT table
  312581807          1         Sec GPT header


Macbook model is: MacbookPro5,5
I guess you've solved it by now, but I had exactly the same problem with fresh new Macbook pro 2017 and I had to reinstall the system (MacOS). Then the installation of Windows 10 through bootcamp went fine.