how can I fix "mbr not found at sector 0"

[ttaqt]

I install bootcamp in My MacBook pro, and my MAC OSX is 10.11. One day, I go to windows in my bootcamp , I try to use pqmagic for my Mobile hard disk partition. But after that, I reboot my computer, I found I can`t go into MAC OSX again, because I show me a folder and question mark.

And than , I make a mac osx installer u disk， I go into the terminate, I use the commandline , I see this result:

 

[maflynn]

Looks like pqmagic corrupted the partition,

If there's no way to recover the data on your original OS X volume, then the only option is re-partiion the drive, format, and reinstall.