Network Link Conditioner not working on macOS Sierra

Step 1: Uninstall Old NLC by right clicking ("remove") it in "System Preference"

Delete Network link conditioner

Step 2:

Open https://developer.apple.com/download/more/ , login to apple account and search for additional tools and Download Additional Tools for Xcode 9.

Tested default and my existing custom profiles, all worked like a charm!

I can't comment (not enough reputation), but figured I'd add that the Xcode 8 tools that have the Network Link Conditioner in it has changed names.

https://developer.apple.com/download/more/

It's now in the "Additional Tools for Xcode 8", instead of "Hardware IO Tools for Xcode 7.x".

Though, that didn't fix any of the issues...

This issue is fixed in the latest version of the Network Link Conditioner - it's in the "Additional Tools for Xcode 8.1" download from https://developer.apple.com/download/more/.

I've tested all the built-in profiles and they work as expected.