I am having massive problems with my R500 units and mac airbooks 10.10.5 / elcapitan
I have had support looknig at this for several weeks and they are of the mind that it is the mac airbooks not the ruckus equipment.
the problem occurs after the computer goes to sleep, it seems to be keeping the WIFI open but not the networking infrastructure to relay the data.
Even more annoying is it only does it with the ruckus, my $20us cisco , asus & TP-link functions without any problems., they seem to force the connection closed, ready for the mac to re-connect after it comes out of sleep.