I have answered your question to the best of my ability. Here are the instructions to do that: How to Reinstall macOSīeyond this, you would need to contact Apple directly and discuss bringing in your MacBook in for repair. If Disk Utility found no errors or repaired everything, you need to reinstall your OS. Here is how you do that: HOW TO REPAIR A MAC DISK WITH DISK UTILITY If THAT doesn't work, then we need to run the Disk Utility to repair the startup. Try restarting to see if your OS loads up normally. If you have Touch ID, press and hold Touch ID instead. While the Mac is on, press and hold the power button on your computer for 10 seconds until the Mac turns off.

Since i'm not receiving a response, I am going to provide some troubleshooting steps for you to follow: When you see a folder with the flashing question mark that means that you MacBook is not detecting an operating system at the moment. Okay, I'll do what I can to assist you but first let me explain what the flashing question mark is.

Macbook pro os x operating system logo