La solución más rápida

Utilice el adoptopenjdk cask

Vea también enlace

Para instalar el último:

brew cask install adoptopenjdk

Para instalar una versión específica

brew tap AdoptOpenJDK/openjdk
brew cask install adoptopenjdk8
brew cask install adoptopenjdk9

Solución manual

Si está buscando simplemente bajar el binario sin realmente instalarlo, simplemente vaya a enlace

También puede instalar openjdk usando este script bash, que obtiene OpenJDK de Zulu, un proveedor comercial que crea y lanza OpenJDK gratis aquí

Puede instalarlo manualmente desde el enlace anterior o usar este script. ¡Tu llamada!

openjdk_install_on_mac.sh

#!/usr/bin/env bash
DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"; PATH="$DIR:$PATH"
ME=$(basename $0)

show_help()
{
  NEW_HOME9="$JDK_HOME/openjdk9"
  IT=$(cat <<EOF

  Installs the latest OpenJDK on your mac, version 8 by default

  usage: sudo $ME {OPENJDK FOLDER NAME} {JDK_VERSION_TO_DOWNLOAD}

  e.g.

  sudo $ME openjdk8    # installs openjdk 8 to $NEW_HOME on your machine.
  sudo $ME openjdk9 9  # installs openjdk 9 to $NEW_HOME9 on your machine.
EOF
  )
  echo "$IT"
  exit
}

if [ "$1" == "help" ]
then
  show_help
fi

# Ensure running as root
if [[ $EUID -ne 0 ]]; then
   echo "This script must be run as root."
   echo "To do this, run 'sudo $ME' instead." 
   exit 1
fi

JDK_HOME="/Library/Java/JavaVirtualMachines"
JDK_VERSION=${2:-8}
JDK_NAME=${1:-openjdk$JDK_VERSION}
NEW_HOME="$JDK_HOME/$JDK_NAME"

# Ensure no jdk already in target folder 
if [ -d "$NEW_HOME" ]; then
  echo "A JDK is already installed at $NEW_HOME"
  echo "Please supply a unique name and try again!"
  exit 1
fi

echo
echo "About to install openjdk to $NEW_HOME"
read -n1 -r -p "Press any key to continue, or Ctrl-C to abort"
echo

url_extract()
{
  tr '"' '\n' | tr "'" '\n' | grep -e ^https:// -e ^http:// -e^// | sort | uniq
}

FILE=/tmp/__jdk_info
curl -s -o $FILE https://www.azul.com/downloads/zulu/zulu-mac/
NEWEST_OPENJDK=$(cat "$FILE" | url_extract | grep "zulu$JDK_VERSION" | grep tar.gz | grep -v pdf | tail -n1)
rm $FILE

echo "About to download latest version of JDK from"
echo "$NEWEST_OPENJDK"
echo "..."
sleep 0.5

FILE=/tmp/__openjdk_download.tar.gz
echo "$NEWEST_OPENJDK"
curl -o "$FILE" "$NEWEST_OPENJDK"

DIR=/tmp/__openjdk
mkdir -p "$DIR"
tar zxvf "$FILE" -C "$DIR"
rm $FILE

mv "$DIR/"* "$NEW_HOME"
rm -fr "$DIR"

echo
echo "Installation Complete!"
echo
echo "OpenJDK now available at $NEW_HOME"