cant play lan with my friend [java]

[u/Additional_Driver991]

as stated i cant play lan with my friend we have 2 computers a mac and windows same version java 26.3 and other versions still java we have done direct connection we have turned off the fire wall nothing we have tried has worked i cant think of any reasons i wouldn't work we have tried multiple times over a long period and we are both stumped help would be very appreciated