We are trying to build a registry of all MAC addresses and associate with individual users. It would be great to be able to export the ARP list into a csv file we could load in a spreadsheet. Winbox will allow me to select all the arps in /ip arp but it will not let me copy and paste. Any ideas how to achieve this?

Thanks.

-Chris

To do things like this from another system, it is also possible to use SNMP. E.g.:
snmpbulkwalk -v2c -c public (router_ip_here) ip.ipNetToMediaTable.ipNetToMediaEntry.ipNetToMediaPhysAddress

Thank you both!