Repair the volume boot os x in my passport ultra for mac?

REPAIR THE VOLUME BOOT OS X IN MY PASSPORT ULTRA FOR MAC? HOW TO

Yours is quite a new model of MacBook Pro : Your firmware would be UEFI compliant. This How do I make my Boot Camp partition bootable again? seems to be very close to my problem, but rEFIt is distributed in CDR format, I tried to convert that to ISO and burn to a USB with no luck, the system won't see the USB.ДЄnyone knows of other ways to fix Bootcamp loader to show OSX partition ? The ACTIVE command can only be used on fixed MBR disks. The selected disk is not a fixed MBR disk. Partition 1 is now the selected partition. Partition 3: 93.47 GB - Boot, Page File, Crash Dump, Primary PartitionДЄnd this is the output of MS DiskPart utility: Partition 2: 620 MB - Primary Partition (no idea what this is for) Partition 1: 837.57 GB - Primary Partition Partition 0: 200 MB - EFI System Partition I checked Disk Management and the OSX partition is still present (partition 1):

I have tried a couple of Windows utilities, trying to change the Active partition, but for some reason that option is always grayed out, even DiskPart doesn't allow to set it. The laptop is a MacBook Pro November 2013 model, with one original SSD drive (without DVD drive, however I have an external one) and I don't have a OSX installation disk, so I could not try recovery utilities etc.

REPAIR THE VOLUME BOOT OS X IN MY PASSPORT ULTRA FOR MAC? HOW TO

Anyone knows how to recover the OSX partition, so that I can boot into OSX ? I'm happy to drop Windows if that's the case, but I cannot proceed with a fresh install wiping OSX.

Windows works just fine (I'm using it now) but my main setup and a lot of work in progress is on OSX so I really need to recover it. When I select 'OSX' from the control panel Bootcamp utility, and reboot, the system goes into Windows regardless. When I hold the ALT button at boot, the menu shows only Windows and there is no option to boot OSX. I installed Windows 8.1 Enterprise via Bootcamp on my MBP (Nov 2013 model), now I can only boot into Windows, no way to boot into OSX.

Repair the volume boot os x in my passport ultra for mac?