Mac OS 怎么停用网络/断网

Mac OS有时需要临时停用网络或者断网，这个情况一般可以通过如下方式实现：

1. 实用工具启动终端
2. 执行指令：

   ifconfig

   输出：

   lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
   	options=1203<RXCSUM,TXCSUM,TXSTATUS,SW_TIMESTAMP>
   	inet 127.0.0.1 netmask 0xff000000 
   	inet6 ::1 prefixlen 128 
   	inet6 fe80::1%lo0 prefixlen 64 scopeid 0x1 
   	nd6 options=201<PERFORMNUD,DAD>
   gif0: flags=8010<POINTOPOINT,MULTICAST> mtu 1280
   stf0: flags=0<> mtu 1280
   UHC0: flags=0<> mtu 0
   EHC2: flags=0<> mtu 0
   XHC1: flags=0<> mtu 0
   en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
   	options=b<RXCSUM,TXCSUM,VLAN_HWTAGGING>
   	ether 00:0c:29:b4:5e:72 
   	inet6 fe80::1cd5:e59b:91b:792d%en0 prefixlen 64 secured scopeid 0x7 
   	inet 192.168.111.131 netmask 0xffffff00 broadcast 192.168.111.255
   	nd6 options=201<PERFORMNUD,DAD>
   	media: autoselect (1000baseT <full-duplex>)
   	status: active
   utun0: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 2000
   	options=6403<RXCSUM,TXCSUM,CHANNEL_IO,PARTIAL_CSUM,ZEROINVERT_CSUM>
   	inet6 fe80::b5ee:9a04:f612:701d%utun0 prefixlen 64 scopeid 0x8 
   	nd6 options=201<PERFORMNUD,DAD>

3. 以上输出，确认网卡是en0，则执行如下指令断开网络：

   sudo ifconfig en0 down

4. 当需要恢复网络的时候，执行：

   sudo ifconfig en0 up

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