Hope this helps someone: I bought an Anker "Aluminum 3-Port USB 3.0 and Ethernet Hub" on Amazon.ca for a mid-2012 MBA. The hub/interface died within an hour or two. It was slow as heck (e.g. 11 Mb/s) and running hot, then nothing. I returned it and bought another thinking it did what I wanted and the Anker seemed to have as good a reputation as all the other alternatives, none of which had the same hub options that I wanted.
I received the second one and it worked much better in terms of speed but it was still running pretty warm. The pic below is from my FLIR One camera attachment. The hub temp is 35+ C, which is about the same as the back of the keyboard area on the MBA. In comparison, the USB-coax SPDIF adapter in front of it runs much cooler, not even warm to the touch. (Slick pic, eh?)
However, the hub did have problems with reconnecting after power shutdowns. It would appear to be connected under the listing of USB devices in System Information/System Report, showing up as "USB 10/100/1000 LAN", but under System Preferences/Network, it would show up in the list of devices on the LHS but it would have the annoying status of not being connected or not responding (sorry, I forget the exact wording).
The solution: I went to the Anker.com/Support and found the "Download List" for the hub. I downloaded the "Upgrade Patch (Mac OS 10.10)" and installed it (checking all the default boxes), and now everything seems to be fine. I can sleep and reboot the MBA and the ethernet connection is alive and well upon awakening.
Note: For some strange reason, I used my PC to look for a driver for my MBA and finding it was simple. I just copied and pasted the name "Aluminum 3-Port USB 3.0 and Ethernet Hub" from another Anker web page into the search field on the Support page and the Download List appeared under the "Downloads & Drivers" label. However, this didn't work on my MBA, which was very annoying. Instead, the page would only show a list of unrelated audio devices (e.g. Premium Stereo Bluetooth Speaker) but by hitting the "LOAD MORE" (device pic) button maybe 9 times (!), the hub eventually showed up in the list. Clicking on the hub pic brought up the same "Download List" that I had so easily found on my PC. I wasn't sure if I was supposed to download the patch that I did use or the last one in the list (i.e. "MAC OS 10.6 to 10.11") but since my MBA has Yosemite 10.10.5, I figured I'd give the patch for 10.10 a shot.
So far, so good.
Audios