No Interfaces Available In Wireshark
Many new Wireshark users on Mac OS X run into an issue where no interfaces show up when trying to begin packet capture. If you attempt to manually input an interface (such as en0) this error will occur:
The capture session could not be initiated ((no devices found) /dev/bpf0: Permission denied).
To have the interfaces show up properly you’ll need to widen the permissions on the Berkeley packet filter (BPF). By default they look like this: We need the filter to be readable by non-root, so open Terminal.app and run this command: Unfortunately every time you reboot this will reset, but if you are a frequent user of Wireshark you can add the ChmodBPF StartupItem to alter them automatically (available in the Utilities folder on the Wireshark disk image). To install you’ll need to follow two steps.
First, drag the ChmodBPF folder to the StartupItems alias in the same folder (or drag it to /Library/StartupItems directly). Type your password to authenticate and move the folder into the correct location.
The second requirement is only for 10.6+ users. Starting with the security permissions of StartupItems are being enforced. Scripts that do not have the proper owner and group will receive this error:
Insecure Startup Item disabled. – “/Library/StartupItems/ChmodBPF” has not been started because it does not have the proper security settings
The proper security settings are ownership of the scripts by root and group of wheel.1 To set them: The correct settings for startup items can be found in this KB article ↩
from：http://langui.sh/2010/01/31/no-i ... wireshark-mac-os-x/
求解ChmodBPF是什么东西？ 能力有限，大概理解就是capture session所需要的/dev/bpf＊没有权限，需要赋予权限，但是从启后还从新需要直接赋予权限的命令，那问提到/Library/StartupItems/这里，应该类似 下的启动菜单，但是文中ChmodBPF是何物？是自写的一个处理这个问题的shell脚本还是？那位童鞋了解过 谢谢了：）