Вам нужен обычный AppleScript:
set statusCommand to "show adsl"
tell application "Terminal"
do script "telnet 192.168.1.1"
set wID to id of front window
delay 1
do script "admin" in front window
delay 1
do script "admin" in front window
delay 1
do script statusCommand in front window
delay 1
set startLine to 1
set answer to every paragraph of (contents of window id wID as text)
do script "exit" in front window
repeat with lineNumber from 2 to count of answer
tell item lineNumber of answer
if it contains statusCommand then
set startLine to lineNumber
end if
if it starts with "Connection closed" then
exit repeat
end if
end tell
end repeat
set status to items (startLine + 1) thru (lineNumber - 1) of answer
end tell
set od to AppleScript's text item delimiters
set AppleScript's text item delimiters to ASCII character 13
display dialog status as text buttons {"OK"}
set AppleScript's text item delimiters to od
