구형 맥 uefi 사운드 오류시 해결 법

 

http://youtube.com/watch?v=6foOrPapEFg

 

 

 

http://youtube.com/watch?v=LbmLVOUpVOA&t=0s 

 

 

https://drive.google.com/file/d/17yuUrzpJdKGqMVyT9TVhmze8hS88V7Xo/view?usp=sharing

https://drive.google.com/file/d/1clPM1REYUVm3J-S6d_fK4xzugkf1q5gK/view?usp=sharing