Network binding on OS X - problem with arp ping tool

I’m running openHAB on Mac OS X and have been trying to use arping after upgrading from OH 2.1 to 2.3. I successfully installed arping by Thomas Habets and changed the path to arpPingToolPath=/usr/sbin/arp. The programme is found but it cannot be run. I have the suspicion that this is because it’s not compatible with the Linux arping tool (different options, e.g. no -w). Does anybody have experience here?