This will execute a command that requires root access. Usage ./sudo_command.exp <password> <command>

sudo_command.exp

#!/usr/bin/expect

# argv 0 is password
# argv 1 is command e.g. kextload -b info.stichling.USBCDCACMControl

# get the password from the commandline
set password [lindex $argv 0]
# get the command from the commandline
set command "sudo [lindex $argv 1]"

# Used for debugging the program arguments
# puts "$password"
# puts "$command"

# use eval to create the parameterized command
eval spawn $command

# simulate entering the user's password so
# so the user doesn't have to.
expect {
  "Password:" {
    send "$password\r"
    exp_continue
  }
}