[SOLVED] Help! Can't boot back into OS X/Windows after Bootcamp/Editing MBR, Partitions are a mess

[darcygibbs]

Okay, so I installed Windows 10 using Boot Camp initially from 10.11.5, everything was fine but I didn't know how to get back into OSX after so I ended up resetting the MBR with EasyBCD trying to use the Vista boot loader instead so I could choose between Widnows and Mac from there, and then I was really stuck on Windows cause I seemed to do this wrong, even pressing alt/option before Apple logo wont get the Macintosh HD to show up.

So then I booted into internet recovery and figured reinstalling OSX would work and rebuilding the boot order back from OSX/Boot Camp. I ended up doing so on a third partition so I wouldnt lose data. I now have OSX 10.11.5, Windows 10, and OSX 10.8.5 all on my Macbook Pro but am stuck in 10.8.5 now.

My 10.11.5 installation shows up on Startup Disk and I can tell my computer to restart into that OS but it ends up just reverting back to my 10.8.5 install. I tried installing boot loaders to see if I could get into the other OS's that way but to no avail.

Only one that seemed to get me closer was REFit, I can see the Recovery Partition (unbootable), Untitled (10.8.5 Bootable) and legacy OS which has a Windows logo so I assume this is my Win10 installation but I can't boot into this either so it all seems fairly useless.

Using rEFit's Partition Inspector I got the following information regarding my partitions.

*** Report for internal hard disk ***

Current GPT partition table:
 #      Start LBA      End LBA  Type
 1             40       409639  EFI System (FAT)
 2         409640    963586359  Unknown
 3      963586360    964855895  Mac OS X Boot
 4      964855896   1377601127  Basic Data
 5     1377863272   1388654151  Mac OS X HFS+
 6     1388916296   1463879591  Mac OS X HFS+
 7     1463879592   1465149127  Mac OS X Boot

Current MBR partition table:
 # A    Start LBA      End LBA  Type
 1              1       409639  ee  EFI Protective
 2         409640    963586359  ac  Apple RAID
 3      963586360    964855895  ab  Mac OS X Boot
 4      964855896   1377601127  0c  FAT32 (LBA)

MBR contents:
 Boot Code: Unknown, but bootable

Partition at LBA 40:
 Boot Code: None (Non-system disk message)
 File System: FAT32
 Listed in GPT as partition 1, type EFI System (FAT)

Partition at LBA 409640:
 Boot Code: None
 File System: HFS Extended (HFS+)
 Listed in GPT as partition 2, type Unknown
 Listed in MBR as partition 2, type ac  Apple RAID

Partition at LBA 963586360:
 Boot Code: None
 File System: HFS Extended (HFS+)
 Listed in GPT as partition 3, type Mac OS X Boot
 Listed in MBR as partition 3, type ab  Mac OS X Boot

Partition at LBA 964855896:
 Boot Code: None
 File System: Unknown
 Listed in GPT as partition 4, type Basic Data
 Listed in MBR as partition 4, type 0c  FAT32 (LBA)

Partition at LBA 1377863272:
 Boot Code: None
 File System: HFS Extended (HFS+)
 Listed in GPT as partition 5, type Mac OS X HFS+

Partition at LBA 1388916296:
 Boot Code: None
 File System: HFS Extended (HFS+)
 Listed in GPT as partition 6, type Mac OS X HFS+

Partition at LBA 1463879592:
 Boot Code: None
 File System: HFS Extended (HFS+)
 Listed in GPT as partition 7, type Mac OS X Boot

Help me out please, I just want to have an easy dual boot between OSX 10.11.5 and Windows 10. I thought the 10.8.5 installation would help me recover the Apple bootloader/bootcamp but cant figure that out. Thanks in advance.

 

[JustSomeJoe]

Normally you just hold the Alt key on power-up and it gives you a list of what to boot from (hold Ctrl and Click to set a default); try it, if it doesn't work then you've totally scr*wed the boot-tracks and it's time to wipe the drive and re-install (reading the instructions FIRST).

 

[McHenryB]

By using a Windows utility (EasyBCD) to alter the boot sector of a Mac disk you have probably corrupted that partition so that it can no longer boot. I'm not sure if there is any way to fix that. I'd update the new installation to the latest version copy all the data from the original partition and delete the original installation.

I would recommend that you never use Windows utilities on OS X partitions.