Ping/ICMP with timestamps, Windows and OSX

From Windows commandprompt:
ping -t <IP-address>|cmd /q /v /c "(pause&pause)>nul & for /l %a in () do (set /p "data=" && echo(!time! !data!)&ping -n 2 localhost>nul"

From OSX terminal:

ping <IP-address> | awk '/^[0-9]+ bytes from / { "date" | getline pong; close("date"); print pong":",$0; }'