With macOS 10.15, Apple introduced new application security checks, which are used by Gatekeeper to verify the contents of distributed software. When you install or run software for the first time, Gatekeeper verifies that the software has been notarized. See Notarizing Your App Before Distribution.

JDK 14 is the first release that complies with the new macOS 10.15 hardening and notarization requirements. If you want to install and test earlier versions of the JDK or JRE on macOS 10.15, this document explains some expect warnings and how to proceed.

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As of the time when this article was written you can still install and run non-notarized software on macOS 10.15 systems by modifying your security preferences. The following steps show you how to install a non-notarized JDK or JRE.

  1. However, the easiest way is to select OpenJDK 11 (LTS), the HotSpot JVM, and macOS x64, which will expose two option like these: Clicking on “Install JDK installer”, will download the OpenJDK installer package, e.g. OpenJDK11U-jdkx64machotspot11.0.411.pkg, which when executed, will install into this location: /Library/Java.
  2. This tutorial will guide you on how to switch JAVA versions on your MacOS device. This can be useful for working with apps which don’t work with updated JAVA versions. For example, applications.
  3. Windows.: Java Windows x64; Java Windows x32. MacOS.: Java MacOS x64 (macOS 10.7.3 and HIGHER!); Linux.: Java Linux x64 RPM; Java Linux x32 RPM; Java Linux x64; Java Linux x32. All versions were taken from the official Java website without modifications and are signed with the Oracle digital signature! Installing Java in Windows (XP, 7, 8, 10).

Note: These steps use the JDK 8u231 macOS installer as an example. These steps apply equally to all other JDK and JRE releases.

The JavaFX SDK and Runtime are also packaged into the standard JDK package. Follow the below steps to install Java on MacOS: Step1: Download the JDK.dmg file from Here, or by executing the below command: jdk-10.interim.update.patch-macosx-x64.dmg. Before downloading the file you must accept license agreements.

Java On Macos Catalina

Installing the JDK Using a .dmg File

  1. Double-click on the .dmg file to begin the installation. The system verifies the .dmg file, then opens a Finder window with the icon of an open box (package) and the name of the .pkg file.
  2. Double-click the package icon to start the installation app. A window appears with a status bar with text similar to the following:
  3. Then, a window appears with text similar to the following:

    'JDK 8 Update 231.pkg' can't be opened because Apple cannot check it for malicious software.

    This software needs to be updated. Contact the developer for more information.

    Click OK.

  4. Open System Preferences, click Security & Privacy, then click the General tab. In the section Allow apps downloaded from:, the following text appears:
  5. 'JDK 8 Update 231.pkg' was blocked from use because it is not from an identified developer.

    Click the Open Anyway button.

  6. A window appears with text similar to the following:
  7. 'JDK 8 Update 231.pkg' can't be opened because Apple cannot check it for malicious software.

    This software needs to be updated. Contact the developer for more information.

    Click the Open button.

  8. A window appears with the following text:

Installer is trying to install new software. Enter your password to allow this.

Macos

Enter your user name and password, then click the Install Software button.

Installing the JDK from a File Archive

You don't have to modify your security preferences if you install the JDK from a .tar.gz file archive, in particular, a prebuilt OpenJDK package. However, the system may warn you the first time you run a Java command-line tool.

Running a Java Command-Line Tool for the First Time

When you run a command-line tool for the first time (such as java), depending on which app (such as Safari or Firefox) you used to download the installer, a window may appear with text similar to the following:

'jdk1.8.0_231.jdk' is an app created by Safari. Are you sure you want to open it?

Click the Open button.

Depending on the folder in which you installed the JDK or JRE, another window may also appear with text similar to the following:

Update Java On Macos

'java' would like to access files in your Downloads folder.

Java On Macos Catalina

Click the OK button.