The Number of Garbage Collectors in Excelsior JET Has Doubled.

Evaluate Excelsior JET 10.5 Now

SPECjbb GC Pauses Chart

New And Noteworthy

CoreBalance™ Garbage Collector

CoreBalance, a brand-new parallel garbage collection algorithm that we have been working on since 2008, is now available in the Enterprise Edition of Excelsior JET. CoreBalance effectively utilizes available CPUs and cores to reduce both the average and maximum GC pause times.

Support for Eclipse RCP 4.4 (Luna)

Huge changes in OSGi precluded us from releasing this earlier in a maintenance update.

OS X 10.10 Support


64‑bit Excelsior JET, Professional and Enterprise Editions are now available for the latest version of Apple's desktop operating system.

New And Improved in The 64-bit Version

  • Trial generation, ported over from the 32‑bit version, is now available on all platforms, including OS X.
  • Smaller, faster executables

Still Missing in The 64-bit Version

  • More compiler optimizations
  • Startup Optimizer and Startup Accelerator
  • Global Optimizer, and hence Java Runtime Slim-Down

We do intend to port all these features over.

OS X Logo

Excelsior JET 10.5 for OS X
(64‑bit, 105 MB)

If you are new to OS X, make sure to read this Knowledge Base article:
HOWTO: Package Your Natively Compiled Java Application as An OS X Application Bundle
Note: Some parts of 64-bit Excelsior JET 10 for Linux require 32-bit libraries.
Make sure to read the installation instructions.

Click here for installation instructions

Free Upgrades

If your Support Contract was active as of Feb 03, 2015, or you have purchased Excelsior JET 10 after that date, you should have received the download instructions for version 10.5 by email.

If the download instructions for your free upgrade and/or the special offer are neither in your inbox nor in your Junk Mail folder, email us at

Support Renewal

If your Support Contract has expired before Feb 03, 2015, but less than a year ago, you can still renew it and receive an upgrade to Excelsior JET 10.5 at no extra cost.

Renew Now

Notice A renewed Support Contract commences from the date of the previous contract expiration. You may wish to renew it for two years so as to ensure that you will get Java 8 support and other goodies at the lowest possible cost.

Full Upgrade

If your Support Contract has expired more than a year ago, you can purchase an upgrade to Excelsior JET 10.5 at 75% of the list price.

Upgrade Now

Discounts applied to multi-platform Excelsior JET bundles ever since we added Linux support back in the day. You could also purchase Windows and Linux licenses separately and still get the same discount. That policy is now generalized as follows:

If you have an Excelsior JET license for any platform(s) and an active Support Contract for that license, you can purchase a license for another platform by paying the difference between the current prices of the respective SKUs. Example

Example Suppose you own a license for Excelsior JET, Professional Edition for Windows and have an active Standard Support Contract. If you were to purchase such a combo today, it would cost you $3,000, whereas the price of the respective Windows + OS X bundle is $6,000. So you only need to pay $3,000 to add the OS X version, instead of its list price of $4,500.

Expired Contracts

If your Support Contract has expired, you first need to renew it or purchase an upgrade. See the Upgrade Eiligibility section above for details.

Microbusiness Licensing Program

If your business still meets Program's criteria, and your tier includes support contract renewals, you can buy Excelsior JET for OS X at the same discount. Both Professional and Enterprise Editions are available, with Basic or Standard Support.

Here are the major items from our to-do list:

  • Support Java 8 and JavaFX 8 on all platforms
  • Add more optimizations to the new AOT compiler
  • Port the remaining delayed features to the new compiler

Stay tuned!

How to Stay Tuned

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