$ sysctl kern.maxfiles
kern.maxfiles: 12288
$ sysctl kern.maxfilesperproc
kern.maxfilesperproc: 10240
$ ulimit -n
256
$ sysctl -A | grep "net.inet.ip.portrange"
net.inet.ip.portrange.lowfirst: 1023
net.inet.ip.portrange.lowlast: 600
net.inet.ip.portrange.first: 49152
net.inet.ip.portrange.last: 65535
net.inet.ip.portrange.hifirst: 49152
net.inet.ip.portrange.hilast: 65535
$ sudo sysctl -w kern.maxfiles=24576
kern.maxfiles: 12288 -> 24576
$ sudo sysctl -w kern.maxfilesperproc=20480
kern.maxfilesperproc: 10240 -> 20480
$ ulimit -n 20480
$ sudo sysctl -w net.inet.ip.portrange.first=32768
net.inet.ip.portrange.first: 49152 -> 32768
$ sudo sysctl -w net.inet.ip.portrange.hifirst=32768
net.inet.ip.portrange.hifirst: 49152 -> 32768