Sep 20, 2016 The latest operating system update for MacBooks and desktop Macs, macOS Sierra, is finally here. Besides eschewing the OS X moniker, Sierra finally brings Siri to the Mac, alongside picture-in.

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Check out this free utility from google:
http://code.google.com/p/namebench/

Namebench For Mac Os Sierra Mac

From the above page:

Google Namebench For Windows 10

Are you a power-user with 5 minutes to spare? Do you want a faster internet experience?
Try out namebench. It hunts down the fastest DNS servers available for your computer to use. namebench runs a fair and thorough benchmark using your web browser history, tcpdump output, or standardized datasets in order to provide an individualized recommendation. namebench is completely free and does not modify your system in any way. This project began as a 20% project at Google.
namebench runs on Mac OS X, Windows, and UNIX, and is available with a graphical user interface as well as a command-line interface.

Namebench For Mac Os Sierra Download

I was surprised to find that for me it recommended a local Verizon DNS as being 28% faster than either Google's 8.8.8.8 (which I was using) or OpenDNS (which I had used in the past).