Oracle Java Standard Edition Development Kit
Oracle · Oracle’s Java 21 JDK for developing, debugging, and monitoring Java applications on macOS.
CaskLanguages & RuntimesApple silicon · Intel
From homebrew/cask
30-day installs108#626 in App
1-year installs2.7KLast 365 days
Latest version21.0.12.1Aug 18 · Aug 18
Download size191MBarm64 / x86_64 · dmg
Release cadenceIrregular0 releases in 30 days
About
Oracle Java Standard Edition Development Kit (JDK) 21 is a Java development kit for macOS. Oracle describes the JDK as including a complete Java Runtime Environment (JRE) together with tools for developing, debugging, and monitoring Java applications. This is the JDK 21 cask, not a standalone JRE or a different JDK release.
- Oracle lists JDK 21 as a previous Long-Term Support (LTS) release of the Java SE Platform.
- The cask installs Oracle’s macOS package and supports Apple silicon and Intel variants.
- Oracle states that JDK 21 updates are provided under the Oracle No-Fee Terms and Conditions until September 2026. Subsequent updates are licensed under the Java SE OTN License; production use beyond that license’s limited free grants requires a fee. Review the applicable terms.
Install with Homebrew Cask:
brew install --cask oracle-jdk@21
Installing this cask means agreeing to Oracle’s no-fee license. After installation, use the JDK’s Java tools from your macOS environment. Oracle also provides installation instructions and release information on its downloads page.
New What’s new in 21.0.12.1 Aug 18 · OpenNavo editorial
- UpdatesIncludes IANA time zone data 2026b.
- LicensingJDK 21 updates after September 2026 switch to the Java SE OTN license.
- SecurityThe next Critical Patch Update is scheduled for October 20, 2026.
Caveats
Installing oracle-jdk@21 means you have AGREED to the license at: https://www.oracle.com/downloads/licenses/no-fee-license.html