Unable boot your Mac OS X Maverick? Searching solution to retrieve data from unbootable hard drive Mac? Well, its cone of the most complicated task for any Mac user. Whenever users boot into their Mac machine, the Operating System mount all the local file systems to accumulate required data stored on your hard drive. However, sometimes it happens that certain volumes remained unmounted on Mac due to which the boot process remains uncompleted and result in such calamitous circumstances. Under such critical situation situation when users attempt to start their Mac system, then the OS refuse to boot and the screen goes completely blue. There are several unpredictable causes which can result in this very critical error issue such as boot sector virus, corrupted or missing file system, Operating System Malfunction, abrupt system shutdown, hard drive crash etc. Anyway whatever may be the reason is, once this issue occurs in your Mac then it causes severe problems and users badly needs to access data from Mac hard drive that Won't boot.