Have you ever been in the situation of failed to start erase of disk due to error (-9999, 0) ? Are you thinking about the solution to fix this error in a simple way? If yes then you have arrived at the correct place. This post will describe you all the essential informations about this error message that comes in your Mac system. Well, the failed to start erase of disk due to error (-9999, 0) is not a very strange, eventhough it is observed by the many users globally. Let me tell you that this error will appear in your Mac computer when the users is trying to use multiple method offered in order to create the bootable thumb drive version of your Mac computer. It is required 8 GB or more than this so you will get failed to start erase of disk due to error (-9999, 0). The effect of this error in the Mac computer is so worst and this may lead to the data loss scenario. Therefore it is advised to all the Mac users that keep yourself backup of all the file. Sometimes users don't have backup file of their lost data so in that condition only Mac data recovery software will help you to retrieve the lost files.