Download Workflow MacOS
The link in the section that references a guide to the longer install process points to the easy installer and needs to be corrected.
Additionally the link and instructions to use the easy installer needs to be removed from this page because it makes no sense to direct people to something that is not available. The correct link is https://geti2p.net/en/download/macos
REMOVE : This is the long way of installing I2P for MacOS, using the IzPack based installer and a separate Java Virtual Machine installed on the host. If you're new to I2P, you may want to try the Easy installer, which requires fewer total steps and automatically configures a JVM and I2P and sets up a Firefox Profile in a single step.