Changelog

The Xcode 26.2.0 image is now available to be used in CircleCI pipelines on the M4 Pro resource classes.

Please see the full manifest for information about the software included with this image release.

Known issues:

• iOS 26 simulators sporadically freeze during boot and may fail to start. We recommend pre-booting simulators and, if they don’t start within 60 seconds, terminate them and restart them.
• Device IDs are inconsistently changing across VMs in Xcode 26. This is an OS-level issue that can affect builds relying on consistent device identifiers. We’ve opened a support ticket with Apple and encourage affected users to do the same to help prioritize a fix.

Following our Xcode image retention policy we will be deprecating Xcode 16.2 on January 14th 2026.

We will be performing 24 hour brownouts from 00:00:01 to 23:59:59 UTC during which these images will be unavailable. The brownout and deprecation schedule can be found below.

The Xcode 26.2 Beta 2 image is now available to be used in CircleCI pipelines on the M4 Pro resource classes.

Please see the full manifest for information about the software included with this image release.

Known issues:

• iOS 26 simulators sporadically freeze during boot and may fail to start. We recommend pre-booting simulators and, if they don’t start within 60 seconds, terminate them and restart them.
• Metal Toolchain is currently non-functional. A workaround is available by running the following commands before use:

    xcodebuild -downloadComponent metalToolchain -exportPath /tmp/MetalExport/
    sed -i '' -e 's/17C5038g/17A5241e/g' /tmp/MetalExport/MetalToolchain-17C5038g.exportedBundle/ExportMetadata.plist
    xcodebuild -importComponent metalToolchain -importPath /tmp/MetalExport/MetalToolchain-17C5038g.exportedBundle

• Device IDs are inconsistently changing across VMs in Xcode 26. This is an OS-level issue that can affect builds relying on consistent device identifiers. We’ve opened a support ticket with Apple and encourage affected users to do the same to help prioritize a fix.

The Xcode 26.1.1 image is now available to be used in CircleCI pipelines on the M4 Pro resource classes.

Please see the full manifest for information about the software included with this image release.

Known issues:

• OS 26 simulators sporadically freeze during boot and may fail to start. We recommend pre-booting simulators and, if they don’t start within 60 seconds, terminate them and restart them.
• Metal Toolchain is currently non-functional. A workaround is available by running the following commands before use:

    xcodebuild -downloadComponent metalToolchain -exportPath /tmp/MetalExport/
    sed -i '' -e 's/17A5295f/17A5241e/g' /tmp/MetalExport/MetalToolchain-17A5295f.exportedBundle/ExportMetadata.plist
    xcodebuild -importComponent metalToolchain -importPath /tmp/MetalExport/MetalToolchain-17A5295f.exportedBundle

• Device IDs are inconsistently changing across VMs in Xcode 26. This is an OS-level issue that can affect builds relying on consistent device identifiers. We’ve opened a support ticket with Apple and encourage affected users to do the same to help prioritize a fix.

The Xcode 26.1 image is now available to be used in CircleCI pipelines on the M4 Pro resource classes.

Please see the full manifest for information about the software included with this image release.

Known issues:

• OS 26 simulators sporadically freeze during boot and may fail to start. We recommend pre-booting simulators and, if they don’t start within 60 seconds, terminate them and restart them.
• Metal Toolchain is currently non-functional. A workaround is available by running the following commands before use:

    xcodebuild -downloadComponent metalToolchain -exportPath /tmp/MetalExport/
    sed -i '' -e 's/17A5295f/17A5241e/g' /tmp/MetalExport/MetalToolchain-17A5295f.exportedBundle/ExportMetadata.plist
    xcodebuild -importComponent metalToolchain -importPath /tmp/MetalExport/MetalToolchain-17A5295f.exportedBundle

• Device IDs are inconsistently changing across VMs in Xcode 26. This is an OS-level issue that can affect builds relying on consistent device identifiers. We’ve opened a support ticket with Apple and encourage affected users to do the same to help prioritize a fix.

The Xcode 26.1 RC (Release Candidate) image is now available to be used in CircleCI pipelines on the M4 Pro resource classes.

Please see the full manifest for information about the software included with this image release.

Known issues:

• OS 26 simulators sporadically freeze during boot and may fail to start. We recommend pre-booting simulators and, if they don’t start within 60 seconds, terminate them and restart them.
• Metal Toolchain is currently non-functional. A workaround is available by running the following commands before use:

    xcodebuild -downloadComponent metalToolchain -exportPath /tmp/MetalExport/
    sed -i '' -e 's/17A5295f/17A5241e/g' /tmp/MetalExport/MetalToolchain-17A5295f.exportedBundle/ExportMetadata.plist
    xcodebuild -importComponent metalToolchain -importPath /tmp/MetalExport/MetalToolchain-17A5295f.exportedBundle

• Device IDs are inconsistently changing across VMs in Xcode 26. This is an OS-level issue that can affect builds relying on consistent device identifiers. We’ve opened a support ticket with Apple and encourage affected users to do the same to help prioritize a fix.

The Xcode 26.1 Beta 3 image is now available to be used in CircleCI pipelines on the M4 Pro resource classes.

Please see the full manifest for information about the software included with this image release.

Known issues:

• OS 26 simulators sporadically freeze during boot and may fail to start. We recommend pre-booting simulators and, if they don’t start within 60 seconds, terminate them and restart them.
• Metal Toolchain is currently non-functional. A workaround is available by running the following commands before use:

    xcodebuild -downloadComponent metalToolchain -exportPath /tmp/MetalExport/
    sed -i '' -e 's/17A5295f/17A5241e/g' /tmp/MetalExport/MetalToolchain-17A5295f.exportedBundle/ExportMetadata.plist
    xcodebuild -importComponent metalToolchain -importPath /tmp/MetalExport/MetalToolchain-17A5295f.exportedBundle

• Device IDs are inconsistently changing across VMs in Xcode 26. This is an OS-level issue that can affect builds relying on consistent device identifiers. We’ve opened a support ticket with Apple and encourage affected users to do the same to help prioritize a fix.

The Xcode 26.1 Beta 2 image is now available to be used in CircleCI pipelines on the M4 Pro resource classes.

Please see the full manifest for information about the software included with this image release.

Known Issues:

• OS 26 simulators sporadically freeze during boot and may fail to start. We recommend pre-booting simulators and, if they don’t start within 60 seconds, terminate them and restart them.
• Metal Toolchain is currently non-functional. A workaround is available by running the following commands before use:

    xcodebuild -downloadComponent metalToolchain -exportPath /tmp/MetalExport/
    sed -i '' -e 's/17A5295f/17A5241e/g' /tmp/MetalExport/MetalToolchain-17A5295f.exportedBundle/ExportMetadata.plist
    xcodebuild -importComponent metalToolchain -importPath /tmp/MetalExport/MetalToolchain-17A5295f.exportedBundle

• Device IDs are inconsistently changing across VMs in Xcode 26. This is an OS-level issue that can affect builds relying on consistent device identifiers. We’ve opened a support ticket with Apple and encourage affected users to do the same to help prioritize a fix.

The Xcode 26.0.1 image is now available to be used in CircleCI pipelines on the M4 Pro resource classes.

Please see the full manifest for information about the software included with this image release.

Known Issues:

• iOS 26 simulators sporadically freeze during boot and may fail to start. We recommend pre-booting simulators and, if they don’t start within 60 seconds, terminate them and restart them.
• Metal Toolchain is currently non-functional. A workaround is available by running the following commands before use:

    xcodebuild -downloadComponent metalToolchain -exportPath /tmp/MetalExport/
    sed -i '' -e 's/17A5295f/17A5241e/g' /tmp/MetalExport/MetalToolchain-17A5295f.exportedBundle/ExportMetadata.plist
    xcodebuild -importComponent metalToolchain -importPath /tmp/MetalExport/MetalToolchain-17A5295f.exportedBundle
  

• Device IDs are inconsistently changing across VMs in Xcode 26. This is an OS-level issue that can affect builds relying on consistent device identifiers. We’ve opened a support ticket with Apple and encourage affected users to do the same to help prioritize a fix.

The Xcode 26.1 Beta 1 image is now available to be used in CircleCI pipelines on the M4 Pro resource classes.

Please see the full manifest for information about the software included with this image release.

Known Issues:

• iOS 26 simulators sporadically freeze during boot and may fail to start. We recommend pre-booting simulators and, if they don’t start within 60 seconds, terminate them and restart them.
• Metal Toolchain is currently non-functional. A workaround is available by running the following commands before use:

    xcodebuild -downloadComponent metalToolchain -exportPath /tmp/MetalExport/
    sed -i '' -e 's/17A5295f/17A5241e/g' /tmp/MetalExport/MetalToolchain-17A5295f.exportedBundle/ExportMetadata.plist
    xcodebuild -importComponent metalToolchain -importPath /tmp/MetalExport/MetalToolchain-17A5295f.exportedBundle
  

• Device IDs are inconsistently changing across VMs in Xcode 26. This is an OS-level issue that can affect builds relying on consistent device identifiers. We’ve opened a support ticket with Apple and encourage affected users to do the same to help prioritize a fix.

The Xcode 26.0 GA image is now available to be used in CircleCI pipelines on the M4 Pro resource classes.

Please see the full manifest for information about the software included with this image release.

Known Issues:

• iOS 26 simulators sporadically freeze during boot and may fail to start. We recommend pre-booting simulators and, if they don’t start within 60 seconds, terminate them and restart them.
• Metal Toolchain is currently non-functional. A workaround is available by running the following commands before use:

    xcodebuild -downloadComponent metalToolchain -exportPath /tmp/MetalExport/
    sed -i '' -e 's/17A5295f/17A5241e/g' /tmp/MetalExport/MetalToolchain-17A5295f.exportedBundle/ExportMetadata.plist
    xcodebuild -importComponent metalToolchain -importPath /tmp/MetalExport/MetalToolchain-17A5295f.exportedBundle
  

• Device IDs are inconsistently changing across VMs in Xcode 26. This is an OS-level issue that can affect builds relying on consistent device identifiers. We’ve opened a support ticket with Apple and encourage affected users to do the same to help prioritize a fix.
• See this community forum post for a workaround to a bug in the iOS 26 simulator device.

Following our updated Xcode image retention policy we will be deprecating Xcode versions which are no longer supported. We will additionally be performing 24 hour brownouts from 00:00:01 to 23:59:59 UTC during which these images will be unavailable. The brownout and deprecation schedule can be found below.

The Xcode 26.0 Beta 7 image is now available to be used in CircleCI pipelines on the M4 Pro resource classes.

Please see the full manifest for information about the software included with this image release.

Known Issues:

• iOS 26 simulators sporadically freeze during boot and may fail to start. We recommend pre-booting simulators and, if they don’t start within 60 seconds, terminate them and restart them.
• Metal Toolchain is currently non-functional. A workaround is available by running the following commands before use:

    xcodebuild -downloadComponent metalToolchain -exportPath /tmp/MetalExport/
    sed -i '' -e 's/17A5295f/17A5241e/g' /tmp/MetalExport/MetalToolchain-17A5295f.exportedBundle/ExportMetadata.plist
    xcodebuild -importComponent metalToolchain -importPath /tmp/MetalExport/MetalToolchain-17A5295f.exportedBundle
  

The Xcode 26.0 Beta 6 image is now available to be used in CircleCI pipelines on the M4 Pro resource classes.

Please see the full manifest for information about the software included with this image release.

Known Issues:

• iOS 26 simulators sporadically freeze during boot and may fail to start. We recommend pre-booting simulators and, if they don’t start within 60 seconds, terminate them and restart them.
• Metal Toolchain is currently non-functional. A workaround is available by running the following commands before use:

    xcodebuild -downloadComponent metalToolchain -exportPath /tmp/MetalExport/
    sed -i '' -e 's/17A5295f/17A5241e/g' /tmp/MetalExport/MetalToolchain-17A5295f.exportedBundle/ExportMetadata.plist
    xcodebuild -importComponent metalToolchain -importPath /tmp/MetalExport/MetalToolchain-17A5295f.exportedBundle
  

The Xcode 26.0 Beta 5 image is now available to be used in CircleCI pipelines on the M4 Pro resource classes.

Please see the full manifest for information about the software included with this image release.

Known Issues:

• iOS 26 simulators sporadically freeze during boot and may fail to start. We recommend pre-booting simulators and, if they don’t start within 60 seconds, terminate them and restart them.
• Metal Toolchain is currently non-functional. A workaround is available by running the following commands before use:

    xcodebuild -downloadComponent metalToolchain -exportPath /tmp/MetalExport/
    sed -i '' -e 's/17A5295f/17A5241e/g' /tmp/MetalExport/MetalToolchain-17A5295f.exportedBundle/ExportMetadata.plist
    xcodebuild -importComponent metalToolchain -importPath /tmp/MetalExport/MetalToolchain-17A5295f.exportedBundle
  

CircleCI machine images have been updated with the latest software versions. Learn more about these changes:

• Ubuntu
• Windows
• Android

CircleCI’s “Linux CUDA” image has been updated to include the Pytorch, Tensorflow, and HuggingFace transformers libraries out-of-the-box.

Users will no longer need to waste time pulling these large libraries into their execution environment when a job is running. This image is currently only available to jobs that use the gen2 GPU resource class.

To use this new image, specify:

linux-cuda-12:default or linux-cuda-12:edge in the image stanza.

What’s New

The quarterly update for Linux images is now available. Note that Ubuntu 20.04 and 22.04 are both available on amd64 and arm64 architecture under the edge tag, and are scheduled to be promoted to the GA release next week.

More details on this release, including software updates, can be found in the Linux 2023 Q3 release Discuss post.

What’s New

Image updates are available for the June 2023 snapshot of Windows Server 2022, as well as the current tag. This includes Windows security and OS updates, and package updates for Windows Server 2022.

For a full list of updated packages and image usage examples, visit the Discuss thread for the June 2023 image.

What’s New

The quarterly update across Linux images is now available. In addition to standard software updates, the following changes have been made:

• Heroku has been removed
• Java 11 has been removed and replaced by Java 17

For more details on this release, refer to the Discuss post.

Before Upgrading

See the CircleCI server 4.1 release notes for upgrade notes for this release.

When upgrading from server v3.x you will need to install v4.0 before installing this version.

What’s New in Release 4.1.0

New features

• Air-gapped installation is now supported on server v4.1.
• Self-signed certificates or private certificate authorities are now supported when using GitHub Enterprise.
• For new installations, Tink can be used as the encryption backend instead of Vault.

Changes

• The minimum Telegraf version is now set to 1.8.14.
• Nomad and Vault images are now stored in templates, rather than hardcoded in charts.
• The Nomad Terraform configurations now have the Nomad port hardcoded. Previously this needed to be entered manually.

Database Migrations

The following databases will run migrations when upgrading this version.

• builds_service
• branch_service
• contexts_service_production
• orbs
• orb_analytics
• permissions
• webhook_service
• conductor_production

Fixes

• The Trigger Pipeline button in the web app now works for forked PRs, and an error message will be visible if the trigger fails.
• Fixed a bug that was preventing forked PRs from building if both the fork and original were building on CircleCI.
• Fixed a bug that was causing intermittent status updates for jobs in GitHub.

Known Issues

• Vault may not refresh its client token after a month of uptime.
• Retry with SSH for jobs using the machine executor advertises a private IP address. For this reason, retry with SSH for jobs using the machine executor works as standard for public installations, but for private installs you would need to ensure that you can access the private IP advertised. For example, by using a VPN into your VPC.
• CircleCI 1.0 builds are not supported. If an attempt is made to run a 1.0 build, no feedback will be available in the application to indicate the cause of the issue. If a build is run on your installation and does not show up in the CircleCI application, users should be directed to use the CircleCI CLI to validate the project configuration and get details of the possible cause of the issue.

To learn more about Server 4.x installation, migration, or operations please see our documentation.

What’s New

Updated Android images for both the Docker and machine executors are now available.

Note that the Docker image has been migrated to Ubuntu 22.04. The machine image remains on Ubuntu 20.04 and will be migrated to 22.04 in the next month. For more details, refer to the Discuss post.

What’s New

The Q1 update for Linux images is now available, using the following image tags:

• ubuntu-2004:2023.02.1
• ubuntu-2204:2023.02.1

This refresh includes standard software updates. Heroku will be deprecated leading into the Q2 updates for Linux images. For more details, refer to the Discuss post.

What’s New

A bug has been fixed in the circle-android utility in the machine image used in the Android orb, where the wait-for-boot step would hang.

The Android cimg and machine images will both be built using Ubuntu Jammy 22.04 in the near future.

Visit the Discuss post for more information.

What’s New

A new set of convenience images have been developed that focus specifically on deployment.

• cimg/deploy
• cimg/aws
• cimg/azure
• cimg/gcp

For more information, visit the Discuss post.