bigsur 降级 catalina，无法在sound里找到关闭按钮了，需要运行终端命令
To turn it on:
sudo nvram StartupMute=%00
To turn it off:
sudo nvram StartupMute=%01
程序员灯塔
转载请注明原文链接：关闭macos启动声音
转载请注明原文链接：关闭macos启动声音
bigsur 降级 catalina，无法在sound里找到关闭按钮了，需要运行终端命令
To turn it on:
sudo nvram StartupMute=%00
To turn it off:
sudo nvram StartupMute=%01
