`nics` on virtualbox are now called `network_adapters`

lib/vagrant/actions/vm/up.rb

@@ -31,8 +31,8 @@ module Vagrant
 
         def setup_mac_address
           logger.info "Matching MAC addresses..."
-          @runner.vm.nics.first.macaddress = @runner.env.config.vm.base_mac
-          @runner.vm.save(true)
+          @runner.vm.network_adapters.first.mac_address = @runner.env.config.vm.base_mac
+          @runner.vm.save
         end
       end
     end

test/vagrant/actions/vm/up_test.rb

@@ -96,10 +96,10 @@ class UpActionTest < Test::Unit::TestCase
   context "setting up MAC address" do
     should "match the mac address with the base" do
       nic = mock("nic")
-      nic.expects(:macaddress=).once
+      nic.expects(:mac_address=).once
 
-      @vm.expects(:nics).returns([nic]).once
-      @vm.expects(:save).with(true).once
+      @vm.expects(:network_adapters).returns([nic]).once
+      @vm.expects(:save).once
 
       @action.setup_mac_address
     end