Installing Apple's Network Link Conditioner Tool

Solution 1:

It's in an additional download. Use this menu item:

Xcode > Open Developer Tool > More Developer Tools...

and get "Hardware IO Tools for Xcode".

For Xcode 8+, get "Additional Tools for Xcode [version]".

Double-click on a .prefPane file to install. If you already have an older .prefPane installed, you'll need to remove it from /Library/PreferencePanes.

Solution 2:

You can also install any of the Hardware IO Tools without installing XCode itself. Simply visit Apple's Download Center and search for "Hardware IO".

Solution 3:

Update on the answer December 2019 Xcode 11.1.2

Apple has moved Network Link Conditioner Tool to additional tools for Xcode

Go to the below link

https://developer.apple.com/download/more/?q=Additional%20Tools

Install the dmg file, select hardware from installer

select Network Link conditioner prefpane