Reply to Running 2 computers with S4

Hey, first off sorry if this has been answered all ready, I tried to look for it but couldn't find it. I recently purchased the Traktor Kontrol S4 and have yet to use it....because my old MacBook can't handle the work load (it's been my main machine for DJing etc fr like 6 years) it's been used and abused lol. So I just have this Kontroller sitting there and really want to use it. I have an iMac available to use (studio) and want to install everything on there and atleast be able to practice etc, but I don't know how that works with the registration and activation of the product. Do I need multiple serial numbers?? Or can I install on 2 computers at 1 time? Any feedback appreciated.

DjCh3