Check https://developer.apple.com/documentation/xcode-release-notes to see new Xcode releases and https://developer.apple.com/xcode-cloud/release-notes/ for Xcode cloud release notes. Xcode cloud doesn't update Xcode versions immediately after release, this may take from a few a hours to some days.

Update Xcode cloud workflow's Xcode version(s)

https://github.com/realm/realm-swift

1. Update pr-ci-matrix.rb. Add or remove version(s) from XCODE_VERSIONS.
2. Run ruby ./scripts/xcode_cloud_helper.rb -t {APP_STORE_CONNECT_TOKEN} synchronize-workflows and select create if you want just to create new workflows, delete to remove unused workflows and both if you want both create and clean.
3. You can also run the update-xcode-cloud-workflows Github action manually for step 2.
4. Enable manually the new created workflows.
5. If needed, add environment values to the newly created workflows.
6. Update version(s) from xcode_versions in scripts/package-examples.rb.
7. Update XCODE_VERSION in .github/workflows/master-push.yml and .github/workflows/publish-release.yml and check if DOC_VERSION, RELEASE_VERSION and TEST_VERSION needs to be updated.
8. Search for #if swift and see if there's any we can remove.
9. Update the Carthage version in CHANGELOG.md (and add a changelog entry).
10. If there's new project settings migrations, open each of the Xcode projects and apply/skip them as applicable. Note that we generally do not want to use the Swift version migrations as we support multiple Swift versions at once.

Notes

• New workflows which includes an environment value should update the environment values manually, e.g. targets with server test. App Store Connect API doesn't have allow to set environment values for workflows in the current API.