Way 2: File system check in single user mode.Otherwise, not only you cannot boot Mac, but also you will lose many important files or folder on Mac.įortunately, two built-in utilities have been created in Mac for the problem. So it is urgent to check out the disk errors and repair them in time while you encounter this problem. Undoubtedly, there are lots of reasons that can lead to failed Mac boot. 2 Ways to Verify and Repair Mac Disk Errors
