macOS
Homebrewverified · 100%
brew install openj9local Homebrew formula metadata
brew
Install openj9 with Homebrew
High performance, scalable, Java virtual machine. Version 0.59.0 via Homebrew; verified 2026-06-25.
install
Additional install commands
overview
Package summary
High performance, scalable, Java virtual machine
Project links
Commands and aliases
- jdmpview
- jitserver
- jpackcore
- jrunscript
- traceformat
history
Project history and usage
Eclipse OpenJ9 is an independent Java Virtual Machine implementation used with OpenJDK class libraries to build a complete JDK. It competes with HotSpot by emphasizing startup, footprint, reliability, throughput, cloud deployment, diagnostics, and JVM implementation diversity.
Project history
OpenJ9 descends from IBM's J9 JVM, which IBM used in production Java runtimes before contributing it to the Eclipse Foundation. The Eclipse project says OpenJ9 represents hundreds of person-years of effort and underpins IBM SDK, Java Technology Edition, a component of many IBM enterprise products.
IBM completed open sourcing J9 as Eclipse OpenJ9 in September 2017. The OpenJ9 repository states that significant parts of the code are also open source through Eclipse OMR, the reusable runtime-component project that shares technology below language-specific virtual machines.
Adoption history
OpenJ9's adoption story is unusual because the implementation had enterprise production history before its Eclipse-era open-source life. Its public positioning is not as a replacement for Java SE itself, but as a JVM that combines with OpenJDK class libraries to produce JDK builds tuned for smaller memory footprint, startup behavior, and cloud deployments.
The project also matters because the Java ecosystem benefits from multiple JVM implementations. The OpenJ9 README explicitly frames that competition as a source of runtime innovation in compressed references, cloud features, ahead-of-time compilation, performance, and lower memory use.
How it is used
Users choose an OpenJ9-based JDK when they want a Java runtime with different startup, memory, JIT, diagnostics, class-sharing, and cloud-oriented tuning behavior than HotSpot. The documentation exposes a large set of OpenJ9-specific runtime options, garbage-collection policies, class data sharing, JITServer, AOT compiler support, CRIU support, and diagnostic tools.
The Homebrew formula is keg-only and tells macOS users to symlink its JDK bundle into /Library/Java/JavaVirtualMachines when they want system Java wrappers to discover it, which reflects the usual JDK packaging friction: multiple Java runtimes can be installed side by side but must be selected deliberately.
Why package nerds care
OpenJ9 is package-nerd catnip because it separates the JDK into pieces packagers often blur together: OpenJDK class libraries, a non-HotSpot JVM, Eclipse OMR runtime components, Java compatibility constraints, and platform-specific JDK bundle registration. A package named openj9 is not just another Java version; it is a different VM lineage.
Timeline
- 2017: IBM contributed the J9 VM to the Eclipse Foundation as the Eclipse OpenJ9 open-source project.
- 2017: IBM SDK, Java Technology Edition version 8 incorporated the Eclipse OpenJ9 VM beginning with service refresh 5.
- Homebrew packages OpenJ9 as a keg-only JDK and describes it as providing a supported LTS JDK rather than an arbitrary Java version selector.
Related projects
- OpenJ9 is closely related to OpenJDK, Eclipse OMR, IBM SDK Java Technology Edition, Eclipse Adoptium builds, and the HotSpot JVM that ships in the main OpenJDK reference implementation.
Sources
security posture
Risk level: orange
broad file, network, media, or database tool signal. generalized runtime or code generation signal.
Risk classifier
orange risk · medium confidence · infrastructure
Why
- broad file, network, media, or database tool signal
- generalized runtime or code generation signal
- infrastructure mutation or orchestration signal
Signals
- text:image,server
- text:jit,shell
- text:virtual machine
Install behavior
- No Homebrew post-install hook is recorded in formula metadata.
- Homebrew bottle metadata is available for 6 platform targets.
- Installs with 6 runtime dependencies.
- Build metadata lists 5 build dependencies.
Recommended review
Before unattended agent use, check whether the tool reads plaintext credentials, writes remote state, publishes artifacts, or shells out to plugins.
executables
Installed executables
| Command | Kind | Exposure | Note |
|---|---|---|---|
jdmpview | cli | global executable | |
jitserver | cli | global executable | |
jpackcore | cli | global executable | |
jrunscript | cli | global executable | |
traceformat | cli | global executable |
freshness
Version and freshness
These signals separate page generation age, package-manager activity, and upstream release comparison. Version lag is warned only when an evidence URL and comparable versions are present.
page generated2026-07-08
manager version0.59.0
manager updated2026-06-25
local dataok
upstreamcurrent
latest detectedopenj9-0.59.0
https://github.com/eclipse-openj9/openj9
- okNo freshness warnings were generated.
install metadata
Package metadata
| Package key | brew:openj9 |
|---|---|
| Version | 0.59.0 |
| Package manager | Homebrew |
| Package manager page | https://formulae.brew.sh/formula/openj9 |
| Homepage | https://www.eclipse.org/openj9/ |
| Repository | https://github.com/eclipse-openj9/openj9 |
| Upstream docs | https://eclipse.dev/openj9/docs |
| License | EPL-2.0 OR Apache-2.0 OR (GPL-2.0-only WITH Classpath-exception-2.0) OR (GPL-2.0-only WITH OpenJDK-assembly-exception-1.0) |
| Source archive | https://github.com/eclipse-openj9/openj9/archive/refs/tags/openj9-0.59.0.tar.gz |
| Last updated | 2026-06-25T13:37:59+02:00 |
| Pulse | updated |
| Dependencies | freetype, giflib, harfbuzz, jpeg-turbo, libpng, little-cms2 |
| Build dependencies | autoconf, bash, cmake, openjdk@25, pkgconf |
| Uses from macOS | libffi |
| Bottle | available (on arm64_linux, arm64_sequoia, arm64_sonoma, arm64_tahoe, sonoma, x86_64_linux) |
| Homebrew post-install | not defined |
| Service | none declared |
| Caveats | This formula provides the latest supported LTS JDK. If you need a specific version, then you will have to use a different method to install OpenJ9. For the system Java wrappers to find this JDK, symlink it with sudo ln -sfn $HOMEBREW_PREFIX/opt/openj9/libexec/openj9.jdk /Library/Java/JavaVirtualMachines/openj9.jdk |
registry facts
Source database details
| Source Database | Homebrew formula API |
|---|---|
| Tap | homebrew/core |
| Full Name | openj9 |
| Version Scheme | 0 |
| Revision | 0 |
| Bottle Stable Root URL | https://ghcr.io/v2/homebrew/core |
| Deprecated | no |
| Disabled | no |
| Keg Only | yes |
| URL Keys |
|
source trail
Generated from repository data
This page is generated by av-web from the private package SQLite artifact built by scripts/generate-pkg-sqlite.py.
Combined YAML source
View the package source record on GitHub.
Used sources
- Geiger risk classifier
- Nucleus package database
- av.db category and tag curation
- cross-ecosystem install command graph
- curated package history
- package relationship graph
- package version freshness
- package-page enrichment