Windows 10 won't boot on El Capitan Every time I try to boot into Windows 10 , I get this message in a black screen:

"no bootable device – insert boot disk and press any key"

Note that it was working before.

Any ideas?

diskutil list

/dev/disk0 (internal, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *500.3 GB   disk0
   1:                  Apple_HFS empty                   209.7 MB   disk0s1
   2:                  Apple_HFS Macintosh HD            199.2 GB   disk0s2
   3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3
   4:                  Apple_HFS em                      650.0 MB   disk0s4
   5:           Linux Filesystem                         119.8 GB   disk0s5
   6:                  Apple_HFS disk0s10                22.0 GB    disk0s6
   7:                  Apple_HFS e                       343.7 MB   disk0s7
   8:                        EFI NO NAME                 2.8 GB     disk0s8
   9:       Microsoft Basic Data BOOTCAMP                149.6 GB   disk0s9
  10:           Windows Recovery                         471.9 MB   disk0s10


diskutil cs list

No CoreStorage logical volume groups found


sudo gpt -vv -r show /dev/disk0

gpt show: /dev/disk0: mediasize=500277790720; sectorsize=512; blocks=977105060
gpt show: /dev/disk0: PMBR at sector 0
gpt show: /dev/disk0: Pri GPT at sector 1
gpt show: /dev/disk0: Sec GPT at sector 977105059

      start       size  index  contents
          0          1         PMBR
          1          1         Pri GPT header
          2         32         Pri GPT table
         34          6
         40     409600      1  GPT part - 48465300-0000-11AA-AA11-00306543ECAC
     409640  389032888      2  GPT part - 48465300-0000-11AA-AA11-00306543ECAC
  389442528    1269536      3  GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC
  390712064    1269536      4  GPT part - 48465300-0000-11AA-AA11-00306543ECAC
  391981600  234019258      5  GPT part - 0FC63DAF-8483-4772-8E79-3D69D8477DE4
  626000858   42952704      6  GPT part - 48465300-0000-11AA-AA11-00306543ECAC
  668953562     262144
  669215706     671368      7  GPT part - 48465300-0000-11AA-AA11-00306543ECAC
  669887074    8617504
  678504578    5541888      8  GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B
  684046466  292136960      9  GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7
  976183426     921600     10  GPT part - DE94BBA4-06D1-4D40-A16A-BFD50179D6AC
  977105026          1
  977105027         32         Sec GPT table
  977105059          1         Sec GPT header


sudo fdisk /dev/disk0

Disk: /dev/disk0 geometry: 60821/255/63 [977105060 sectors]
Signature: 0xAA55

         Starting       Ending
 id  cyl  hd sec -  cyl  hd sec [     start -       size]
------------------------------------------------------------------------
1: EE 1023 255  63 - 1023 255  63 [         1 -  977105059] &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
So after almost 48 hours of trial and error this is what saved the day.


Boot on recovery mode and csrutil disable
boot back on OSX
Run diskutil list
Find BOOTCAMP from 'diskutil list' and check the ID (the very first number at the start of the line)
sudo gdisk /dev/disk0


now just input those single letters and press Enter each time


r go to the recovery &amp; transformation menu
h create a new hybrid MBR.
ID add partition ID to the MBR.  Your’s may be different! Use what you got from line 4 above.
y if you are asked “Place EFI GPT (0xEE) partition first in MBR (good for GRUB)?”
accept the default MBR hex code of 07
y set the bootable flag
n do not protect more partitions
o print (display) the MBR.
w Recovery/transformation command (write partition table to disk)
y Say yes to question: do you want to proceed.