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by tptacek 3758 days ago
I don't know what to tell you. Normal users can't tcpdump loopback on OSX, or anywhere else.

    > $ ls -l /dev/bpf*                                                                      
    crw-------  1 root  wheel   23,   0 Feb 29 07:59 /dev/bpf0
    crw-------  1 root  wheel   23,   1 Feb 29 07:59 /dev/bpf1
    crw-------  1 root  wheel   23,   2 Mar  2 11:11 /dev/bpf2
    crw-------  1 root  wheel   23,   3 Mar  2 10:07 /dev/bpf3
    crw-------  1 root  wheel   23,   4 Feb 29 08:11 /dev/bpf4