Have you ever encountered Mac error symbols on startup ? Is this question makes you worried and you are looking for the easy solution to fix this issue? If yes then you have reached at the right place. Here you will come to know the complete details about this issue. Well, the Mac error symbols on startup is the common issue identified by the many Mac users. When any user got Mac error symbol each time while turn on the startup then the reason behind this is startup file “boot.efi”. During the boot process if the system fails then also you may face this problem. Some other issue are which causes Mac error symbols on startup. Such as power supply issue, hard drive, logic board, corruption of OS, battery issue etc. In order to fix this issue of Mac error symbols on startup you can go through the manual steps. It is informed you that while doing this there if you made any minor mistake then it might results to loss of important data. Hence if you come across this situation then immediately take help of a third party software which is known as a Mac data recovery software. It is suitable for the all Mac computers.