How to add custom items on mac for Botmakers pserver

Hi guys! Can anyone help me to add custom items? Or if someone has custom items already done.... Could you send me the codes? So ill just copy and paste in and have them? I did one already like what I described. Please if anyone can send me the codes, because i know that would be hard to add custom items on an iMac! Please help me

can u not just edit the xml file and add them urself as u would on windows? is it different.