Although, Mac system is more reliable and powerful than other operating system. But, still it is not free from glitches. Many a times, while accessing their Mac system users may face some annoying error message like restore failure error 254. Further, after the emergence of failure error, some of the stored images or files becomes inaccessible and even you have to faces some slow & sluggish behavior of your Mac system. So, now it becomes necessary to take some urgent steps to get rid of restore failure error 254. In such situation, you should take help of Disk utility. It is a free application get installed with the installation of Mac OS X and present inside system setting. So, what you have to do is to simply run it to repair the damage ISO files and other system file. Because, the main reason for the emergence of restore failure error 254 is the corruption or deletion of ISO files. However, if due to any of the reasons Disk utility fails to rescue the problem then, you should make use of Mac data recovery software.