A method in which, you try to gain access to the protected data in a Mac operating system, by making changes to the design flow of a software, is called a Jailbreak attempt. This can be done by changing the root directory of the operating system. This method lets you run your own code, in devices like the iPod. The Jailbreak attempt may sometimes result in severe damage to these devices, which results in these devices not booting up.
The primary reason for loss of data in this form is due to damaged kernel extensions which are related to the USB and IO of the device. Sometimes corrupted system files also result in loss of essential data. If your system does startup, you can continue using the affected hard drive, by connecting it to another healthy Mac computer. If the system is not bootable, it is mandatory to make use of a Mac data recovery software, to recover Mac hard drive.
REMO Recover (Mac) Pro Edition software lets you recover data from non bootable hard drives with ease. You can connect the affected hard drive as a slave to a healthy drive, and recover data from the affected hard drive, using the healthy system. This Mac recovery software recovers lost, missing or deleted HFS+ and HFSX volumes by making use of the extremely fast recovery engine. In addition to recovery of lost volumes, the software also lets you recover data files and media files with ease.