You can download the Java Developers Kit from Oracle, at On macOS, the Java Developers Kit includes everything you need. The installer runs.

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Last Updated: September 26, 2017 Macs do not include Java by default so you have to download and install Java on El Capitan, Sierra and High Sierra separately. One of the most common problems users have after upgrading to El Capitan, Sierra or High Sierra is an error message when trying to access certain websites or run apps that require Java and this tutorial helps fix that. There are also issues regarding legacy support for Java 6 in macOS 10.12 Sierra which we clarify at the end of the article. Note that we don’t recommend you install Java unless absolutely essential because it’s notoriously unstable and insecure and once installed, you can’t ever fully.

However, if you’re one of those people that has no choice because the website you need to access, application you want to use or the game you want to play requires it, follow these instructions. How To Install Java On El Capitan, Sierra & High Sierra If you’ve upgraded to El Capitan,macos Sierra or High Sierra and keep receiving the error message pop up: To use the “java” command line tool you need to install a Java SDK It’s because an application you have installed or a website you’re trying to access requires Java to launch or work properly. If you’ve never installed Java on Mac, then you can simply which is known as Java 8 but rather confusingly officially called Java 1.8 by Oracle.

If you’re not sure whether Java is installed on your Mac, simply search for Terminal in Spotlight and type: java -version at the command prompt. If Java is on your Mac, you’ll see a message saying something like “Java (TM) Runtime Environment” in this case version 1.6 (or Java 6 as it is commonly known). If you find that you already have Java 1.6 installed, scroll down below “How to update Java 6 in El Capitan” as you also need to install a special update from Apple. Java Installation Problems in El Capitan, Sierra & High Sierra If you run into problems during the installation of Java, it’s because Apple has added an extra layer of security to Macs known as Rootless SIP. Java has such a bad rep on Macs that Apple has made it increasingly difficult to install it and other things that can potentially damage OS X.

If your Mac is blocking the installation of Java, follow these instructions to disable rootless SIP and try again: • Restart your Mac when the screen turns black hold down ⌘R until the Apple logo appears. • Select the “Utilities” menu and then “Terminal”. In Terminal type: csrutil disable • Hit Return and then restart OS X. Your Mac will then restart with SIP disabled and you can try installing Java again. • To re-enable System Integrity Protection, follow exactly the same procedure except type: csrutil enable • Rootless SIP is then renabled on your Mac. Mac Note: You will have to deactivate SIP when new updates for Java are released as Java will not update while SIP is enabled.

Java and JavaScript are completely different It’s most unfortunate that these two languages have such similar names, as it makes them so easy to confuse. Although influenced by Java, JavaScript is an event-driven language used extensively on webpages, which is normally built into your browser and other apps which support it.

Think of it as a type of AppleScript which runs in web pages. In Safari, you control JavaScript in the Security section of its Preferences dialog. Unless you have good reasons to disable it, it is best enabled, as many websites stop working if your browser doesn’t handle its scripts. It has also been built into other apps as a scripting language: again, their support is built-in, and there are no separate components to install or keep updated. Java is normally installed as an add-in to macOS, and supports the running of Java apps via web pages and as standalone apps on your Mac. Safari’s controls over Java are quite separate, and part of the Websites section of its Preferences. By default, Safari and other browsers will not run Java automatically, but at least ask you if you want to enable it for that site, when it’s installed.