Being a Macbook pro user are you facing the issue that Macbook pro won't startup? Are you gettig worried and looking for the guidelines ? If yes then you don't need to worry any more as here you will come to know that what you need to do whenever you notice that Macbook pro won't startup. Actually this is not a very strange issue, some other users of Mac book pro are facing the same issue. In the Mac computers issues is very common and this computer is not immune to the software and hardware problems. The system became freeze or fails to startup. The power is also not working and if it is working but failing to startup. In this situation users are getting worried about the data which they stored in the computer memory. There are many things which stop your Macbook pro to start. If your Macbook pro won't startup then you should do some steps. Ensure that the power is plugged in the power source. Check the hardware and then perform a power cycle. Now reset the system management controller firmware. Use disk utility from recovery mode and restore from recovery mode. If in case you loss any data from your Macbook pro then use the Mac data recovery software.