Simulating slow connections in Mac OS

activate.sh

#!/bin/bash

ipfw pipe 1 config bw 128Kbit/s delay 120ms

ipfw add 1 pipe 1 src-port 80
ipfw add 2 pipe 1 dst-port 80
ipfw add 3 pipe 1 src-port 8080
ipfw add 4 pipe 1 dst-port 8080

deactivate.sh

#!/bin/bash

ipfw delete 1
ipfw delete 2
ipfw delete 3
ipfw delete 4

ipfw pipe 1 delete