More Apple Core Rot.
Two weeks ago I wrote that Apple Breaks Thunderbolt Networking in OS X 10.11.6?.
Well, the trolls on the networking team did more than break Thunderbolt networking: it now takes my iMac 5K around 30 seconds to restore networking after coming out of sleep (gigabit ethernet). It’s super annoying.
The MacBook Pro Retina and 2013 Mac Pro wake up normally, so it seems to be an iMac thing.