If you’re a current ArcaOS 5.0 licensee, the upgrade to ArcaOS 5.1 is available at a discount. With a valid ArcaOS 5.0 Support & Maintenance subscription, your discount is even bigger (plus, your remaining 5.0 subscription time will be added to the included 5.1 support term).

To upgrade and download your 5.1 ISO, visit your customer portal page and select the ArcaOS Download Center link on the navigation panel to the left. Click the Upgrade to 5.1 button, and proceed to checkout.

Once you’ve completed the checkout process, your initial ArcaOS 5.1 ISO will be built in English. When other languages are available for ArcaOS 5.1, you may request any additional ISOs (free of charge, as long as your Support & Maintenance subscription remains in effect) from your ArcaOS Download Center by selecting the Build ISO again button and selecting the language you would like.

Once an ArcaOS 5.0 license has been upgraded to ArcaOS 5.1, support and updates for the 5.0 license will cease. Not all ArcaOS 5.1 associated downloads will be applicable to 5.0, and licensed updates for one version are specifically not licensed for use with the other version.

If your original ArcaOS 5.0 license order contained more than one license and you only wish to upgrade one or some of them but not all, please contact support.

See this post for a summary of pricing options for ArcaOS 5.1 upgrades.

After years in development, Arca Noae is pleased to announce the general availability of ArcaOS 5.1.0.

In a first for any OS/2-based distribution, ArcaOS 5.1 supports installation on the latest generation of UEFI-based systems, and includes the ability to install to GPT-based disk layouts. This enables ArcaOS 5.1 to install on a wide array of modern hardware.

ArcaOS 5.1.0 can be used for new installs or to upgrade any prior version of ArcaOS 5. If installing from USB stick, the USB install stick may be created using any major operating system at hand (Windows, Linux, MacOS, and of course, OS/2, eComStation, and ArcaOS). Once built, the USB stick can be inserted into any USB port in the target system to boot into the ArcaOS installer/updater in either UEFI or traditional BIOS mode (alternatively, the DVD image may be burned to physical media and also booted to either UEFI or traditional BIOS systems).

For a complete list of updates in this release, see the ArcaOS wiki. Be sure to review the README.TXT, as well, as this contains critical information to ensure that you get up and running fast, and includes tips for getting things adjusted right away.

This upgrade is available at a steep discount with your valid ArcaOS 5.0 Support & Maintenance subscription (and your remaining subscription time will be added to the included support term). To download your fresh ISO, simply visit your customer portal page and select the ArcaOS Download Center link on the navigation panel to the left. From there, click the “Upgrade to 5.1” button, and proceed to checkout.

If your ArcaOS 5.0 Support & Maintenance subscription has already expired, you may still upgrade at less than the cost of a new ArcaOS 5.1 license. Follow the procedure above to order your upgrade, and the discount will be reflected in your cart.

ArcaOS 5.1.0 is available in English ONLY, with other languages planned to follow in the near future.