For a while I've been looking for a way to increase os x networking performance over the mediocre e1000-82545em we all use. I've even run my network connection over a ub3 card and ethernet adapter. And since the virtio-net virtual adapter delivers the same lackluster performance as the e1000, I went hunting around for alternatives.   I ran across an article online (http://www.virtuallyghetto.com/2016/10/vmxnet3-driver-now-included-in-mac-os-x-10-11-el-capitan.html) which states that the VMXNE