On Nov 27, 2017, at 01:24, Serhiy Storchaka <report@bugs.python.org> wrote:
> 
> 3. Makes methods for getting the address of the real network card preferring universally administered addresses and falling back to locally  administered address only if universally administered addresses are not found. This is a new feature. But are there computers that have both universally and locally administered addresses (and with locally administered addresses enumerated first)?

There are certainly computers that have both universal and local admin MAC addresses, as proven by the MBP+TouchBar case that triggered this.  I don’t know whether we can assume anything about the order in which those are enumerated.