如何进入MacBook的BIOS。
找了很久也没有找到如何进入苹果电脑BIOS的方法，今天偶然发现了一个方法，还没有实际试用。
1 Shut down your MacBook by pressing the Power On/Off button once and choosing “Shutdown.”
2 Power on your MacBook after it has completely turned off.
3 Press the following keys simultaneously “Command,” “Option” and the letters “O” and “F” before the system starts up.
4 Press the keys until a prompt screen opens up. You have accessed MacBook’s BIOS equivalent.