How do I install jmeter on a Mac?

The easiest way to install it is using Homebrew:

brew install jmeter

Plugins are now included

And to open it, use the following command (since it doesn't appear in your Applications):

open /usr/local/bin/jmeter

jmeter is now just installed with

brew install jmeter

This version includes the plugin manager that you can use to download the additional plugins.

OUTDATED:

If you want to include the plugins (JMeterPlugins Standard, Extras, ExtrasLibs, WebDriver and Hadoop) use:

brew install jmeter --with-plugins