Yes, a bootable USB for Mac OS can sometimes help solve startup problems especially in a case where the computer faces issues related to software. This way, an individual can boot into another environment and carry out the necessary operations.
It can be useful for:
1.Reinstallation of Mac OS
2.Fixing startup problems
3.Accessing recovery tools
4.Checking damaged system files
However, if the problem is hardware-related, a bootable USB for Mac OS cannot always help solve the problem.