April 2026 monthly summary for Xamarin.Macios focusing on business value and technical accomplishments: - Cross-platform compatibility and tooling modernization to support .NET 9 and Xcode 26.x across iOS, macOS, tvOS, and Mac Catalyst. Updated NuGet stable versions and improved API documentation/error handling for consistency and developer experience. - CryptoTokenKit NFC Bindings: Added NFC capabilities to CryptoTokenKit bindings, including creating NFC smart card slots and checking NFC support, enabling new security/authentication workflows. - ImageCaptureCore API Bindings Enhancements: Introduced new API bindings for image capture (fingerprint generation, security-scoped URL requests); deprecated tethering and file uploads to align with macOS 14+ and the latest Xcode, modernizing the binding surface. - API stability and quality improvements: Aligned bindings with Xcode 26.4, resolved API diffs and enum backings (ICReturnCodeOffset) and updated reference/stable versions to latest .NET/Xcode releases; co-authored fixes with Copilot where applicable. Overall impact: Reduced upgrade friction for developers targeting Apple platforms, enabled NFC-based credential workflows, and supported newer image-capture capabilities with improved security/access patterns and better documentation. Technical achievements demonstrate strong bindings craftsmanship across C#/Xcode interop, attention to API stability, and proactive modernization.

Month: 2026-03. This period focused on stabilizing Xcode 26.4 readiness, accelerating CI reliability, and improving binding maintainability across dotnet/macios and Xamarin.Macios. The team delivered Xcode 26.4 readiness features, hardened CI/test configurations, and expanded binding generation capabilities, while fixing several build and test stability issues that previously caused CI noise.

February 2026 monthly summary for xamarin/xamarin-macios and dotnet/macios. Focused on CI reliability improvements and environment upgrades that directly impact developer velocity and release quality. Key features delivered: - CI Pipeline macOS Tahoe upgrade: Updated the CI infrastructure to macOS Tahoe, replacing Sequoia, improving compatibility with newer toolchains (commit e04e9e5de6c467d4b1dd21e0bd96b1b5e6c07e6c). - Xcode environment upgrade (dotnet/macios): Updated to Xcode 26.3 to align with latest features and tooling (commit 7e4857fe1634771c28098f3249d45d4b62fb13c9). Major bugs fixed: - CI Pipeline PR Detection Logic: Fixed PR detection in the CI configuration to correctly classify builds as PRs or non-PRs and avoid errors when PR metadata is missing (commit 79818dae45dc75ce80c35a595ef0f57fd8d2f12b). Overall impact and accomplishments: - Significantly reduced CI failures related to PR metadata, enabling more reliable PR validation and faster feedback cycles. - Ensured CI and development environments stay current with macOS and Xcode tooling, supporting new features and smoother integration with downstream services. - Strengthened cross-repo collaboration with clear attribution in commits (Co-authored-by). Technologies/skills demonstrated: - CI/CD pipeline debugging and hardening (VSTS.psm1 PR handling, BuildReason logic, parse_pr_labels.ps1 alignment). - macOS CI infrastructure management and image lifecycle (Tahoe upgrade). - Xcode environment management and project configuration for macOS/macOS tooling. - Git-based collaboration and attribution practices.

December 2025 performance summary: Delivered critical Xcode 26.2 readiness for Xamarin.Macios by implementing compatibility updates and upgrading the toolchain, complemented by AI-generated Azure DevOps build system documentation. These changes align the project with the latest Apple toolchain, reduce upgrade risk for downstream teams, and improve CI transparency and onboarding.

November 2025: Xcode 26.2 readiness across Apple platforms (iOS/macOS/tvOS/MacCatalyst) with consolidated config, versioning, and password management updates in AuthenticationServices. Upgraded NuGet packages and added test scaffolding and Beta notes to support ongoing Xcode 26.2 validation. Cross-framework bindings and API enhancements for AVFoundation, GameKit, BrowserEngineKit, GameController, HealthKit, PassKit, and SafariServices updated to align with Xcode 26.2 features and deprecations. Implemented alignment with Beta 1/2 updates and refreshed binding surfaces to improve compatibility and stability. No major bugs were reported in this period based on available data.

October 2025 delivered critical Xcode 26.1 readiness and platform updates for xamarin/xamarin-macios. Key milestones include Xcode 26.1 compatibility updates, Passkeys Authentication security enhancements, Accessibility/UI bindings improvements, and AR/Graphics bindings and testing enhancements, aligning with iOS 16.0 support. These changes reduce release risk, improve security posture, and expand platform capabilities, driving faster release cycles and better developer experience.

Month 2025-09: Stabilized build system and aligned CI/CD with Xcode 26 across two repos, introduced new framework bindings, enhanced test reporting readability, and laid the groundwork for inventory management. These changes improved CI reliability, developer workflow, and testing resilience while enabling future inventory capabilities.

August 2025 focused on delivering Xcode 26 Beta compatibility across Xamarin.Macios bindings and stabilizing the CI/CD and test configurations for macOS 26 arm64. Completed major updates to cross-platform bindings (GameController, GameKit, WebKit, AppKit, CarPlay, UIKit, PassKit, SensorKit) to align with Xcode 26 Beta, introducing new fields, enums, and properties while deprecating legacy APIs where appropriate. Implemented project and CI/CD configuration improvements to support Xcode 26 Beta releases and macOS 26 testing, including fixes to API scanning subscription and cleanup of outdated selectors. These changes enable developers to build with the latest Xcode, access new platform capabilities, and maintain build/test stability across the toolchain.

July 2025 summary for xamarin/xamarin-macios: Focused on enabling migration to Xcode 26 betas through comprehensive bindings updates (WebKit, UIKit, AppKit) and test modernization. Major bugs fixed include compatibility regressions with Xcode 26 betas and scene lifecycle changes, which were addressed by aligning bindings and tests with the new API surfaces. Impact: smoother upgrade paths for customers, reduced migration risk, and a more modern, stable binding surface that supports the latest UI and WebKit features. Technologies/skills demonstrated: WebKit bindings, UIKit/AppKit bindings, SceneDelegate lifecycle adaptation, test modernization, deprecation management, and cross-platform maintainability.

June 2025 monthly summary for xamarin/xamarin-macios focused on delivering updated Apple platform support and stabilizing the CI pipeline to align with new SDKs and Xcode versions. The work maintained alignment with latest Apple platform changes and improved build reliability for downstream teams.

May 2025 monthly summary for repository xamarin/xamarin-macios highlighting delivery of a stable Xcode build environment and CI alignment. Focused on upgrading the build pipeline to reference Xcode 16.4 stable, reducing variance from beta channels and improving reproducibility across macOS CI runners.

April 2025 monthly summary for repository xamarin/xamarin-macios: Delivered a strategic upgrade to .NET 9 stable dependencies and platform packages across iOS, tvOS, MacCatalyst, and macOS. Implemented a new .NET 9 stable subscription source and updated version properties to reflect the new baseline, ensuring downstream projects align with the latest runtime and tooling. API compatibility was aligned with the latest stable via ApiDiff bump to prevent integration drift. These changes improve build stability, reduce dependency drift, and position the project for faster adoption of .NET 9 features.

2025-03 Monthly Summary: Build System Update to Xcode 16.3 Release Candidate 2 for Xamarin.Macios to maintain CI stability and toolchain readiness. No API changes introduced; updated Xcode URL and developer root path accordingly. This work keeps the repository aligned with the latest Xcode RC, enabling early validation and reducing build breakages across iOS/macOS projects.

February 2025 monthly summary focusing on security and governance dependency updates across the Xamarin.iOS/macOS stack (xamarin/xamarin-macios). The primary deliverable was updating critical library dependencies to secure/up-to-date versions and ensuring governance compliance. This quarter also included an ADR tool transient dependency update to address a S360 ComponentGovernance alert, improving security posture and maintainability.

January 2025: Key CI improvements delivered for xamarin/xamarin-macios. Stabilized the signing artifact workflow by increasing the timeout and upgraded CI to macOS Sequoia for builds and tests, reducing flaky failures and enabling faster releases. No major user-facing bugs fixed this month; focus was on pipeline reliability, build stability, and modernization of the CI environment. Technologies demonstrated include CI pipeline tuning, platform upgrade, and release automation.

December 2024 performance summary for Xamarin.Mac (xamarin/xamarin-macios). The main delivery focused on expanding CI coverage for macOS ARM64. A new pipeline stage to enable Sequoia arm64 tests was added, improving validation on the latest macOS hardware and versions.

Month 2024-11: Release readiness focus for xamarin-macios. Completed SDK/NuGet alignment across iOS, tvOS, Mac Catalyst, and macOS, and prepared project for Xcode 16.2 Beta 2. These actions reduce release risk, improve compatibility with upcoming stable releases, and strengthen CI/test readiness ahead of the next stability milestone.

Month: 2024-10 | dotnet/macios This month delivered Xcode 16.1 RC compatibility updates across core macOS/iOS bindings and ensured a stable build/test workflow for the RC release. A targeted set of commits updated bindings and configurations across HealthKit, TVServices, Intents, UIKit, PencilKit, and NetworkExtension, followed by a bump to the stable release of Xcode 16.1 to lock in compatibility. The work minimized disruption for downstream apps relying on macOS/iOS bindings and enabled immediate adoption of the new Xcode tooling. Key outcomes: - Features delivered: Cross-component compatibility updates and configuration changes to align with Xcode 16.1 RC, including HealthKit, TVServices, Intents, UIKit, PencilKit, and NetworkExtension; updates to build/test configurations for RC readiness. - Major bugs fixed: Resolved cross-module incompatibilities and build failures introduced by Xcode 16.1 RC across multiple components, ensuring successful compilation and testing against RC. - Impact and accomplishments: Maintained momentum by enabling developers to build and test with the latest Xcode, reducing blocker risk for releases and improving time-to-value for RC adoption. - Technologies/skills demonstrated: Cross-repo coordination, multi-module bindings and configuration updates, CI/build-system adjustments, API alignment, and RC readiness practices.