如果你安装了XCODE，你可以发出哔哔声。我还没有发现我可以让打印“\a”字符在C中工作。

有一种方法可以让声音在程序运行时工作，启动XCODE，在XCODE下拉菜单，首选项，行为，选中第一个框播放声音，从列表中选择或添加一个声音。

这是一种方法，但我认为只有在程序运行时才能做到。

macOS中没有“硬件哔哔声”。

The functionality you're thinking of is an artifact of very old (pre-1990s) IBM PC-compatible hardware. Before most computers had sound cards, most machines had a small speaker or piezo buzzer connected to one of the channels of a timer chip. This could be used to generate simple tones or beeps. Even after many computers integrated sound cards, it remained common for quite some time for computers to route this output to a separate internal speaker. More recently, many computers, especially laptops, have integrated this functionality into the onboard sound card.

(如果你对PC扬声器接口工作原理的技术细节感到好奇，这里有更多细节。)

这种硬件在苹果电脑中从未存在过。唯一可用的音频输出是通过声卡，macOS中唯一的系统哔哔声是用户的警报声。

告诉应用程序“系统事件”哔哔声

这适用于我(mac os 10.14.6)

echo "\x07"  

打印\a并不总是为我工作(MBA, 10.7.4)。我用这个代替:

say "beep"

要了解更多选项，请听并选择

ls /System/Library/Sounds/ | awk '{print $1}' | while read sound; do printf "using $sound...\n"; afplay /System/Library/Sounds/$voice; sleep 0.5; done

ls /System/Library/PrivateFrameworks/ScreenReader.framework/Versions/A/Resources/Sounds/ | awk '{print $1}' | while read sound; do printf "using $voice...\n"; afplay /System/Library/PrivateFrameworks/ScreenReader.framework/Versions/A/Resources/Sounds/$sound; sleep 0.5; done