Operating Systems

59 releases
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watchOS β†—

watchOS 27

watchOS 27 is a major Apple Watch operating system release introducing Siri AI, a dedicated Siri app, a dynamic app grid, new gesture controls, Smart Stack improvements, expanded Workout Buddy capabilities, and new health and fitness features. The release also expands developer capabilities through Foundation Models, Vision, and new HealthKit APIs.

26.6β†’27FeatureBug fixPerformanceSep 14, 2026
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macOS β†—

macOS 27 Golden Gate

macOS 27 Golden Gate is a major operating system release introducing Siri AI, expanded Apple Intelligence capabilities, Visual Intelligence on Mac, design refinements, improved search and productivity features, and broad platform and performance improvements. The release also represents an important enterprise compatibility milestone: macOS 27 is the final macOS release with general Rosetta support for Intel-only applications on Apple silicon Macs.

26.7β†’27SecurityFeatureBreakingBug fixPerformanceSep 14, 2026
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iPadOS β†—

iPadOS 27

iPadOS 27 is a major Apple operating system release introducing expanded Apple Intelligence capabilities, significant improvements to multitasking and the iPad user experience, new developer APIs, and enterprise device-management enhancements. The release also introduces stricter TLS requirements for MDM, Declarative Device Management, Automated Device Enrollment, configuration profile installation, app installation, and software update services. Apple released iPadOS 27.0 build 24A437 on September 14, 2026.

26.7β†’27.0SecurityFeatureBreakingBug fixPerformanceSep 14, 2026
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IOS
iOS β†—

iOS 27

iOS 27 is a major Apple operating system release introducing Siri AI and expanded Apple Intelligence capabilities, new AI-powered photo and visual-search tools, enhanced child-safety features, and broad performance and usability improvements. For enterprise environments, iOS 27 also introduces stricter TLS requirements for system services involved in MDM, Declarative Device Management, Automated Device Enrollment, configuration profiles, application installation, and software updates. Apple confirms build 24A437 as the production release.

26.7β†’27SecurityFeatureBreakingBug fixPerformanceSep 14, 2026
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W10
Windows 10 β†—

Windows 10 22H2 KB5129236

Windows 10 build 19045.7727 (KB5129236) is an out-of-band update released shortly after the September 2026 security update. It is intended to address an issue requiring an unscheduled servicing release rather than introducing new functionality. The update applies to supported Windows 10 servicing scenarios, including eligible ESU and LTSC environments.

19045.7725β†’19045.7727EmergencyBug fixSep 14, 2026
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macOS β†—

macOS 26.7

macOS Tahoe 26.7 is a security-focused maintenance release for Mac systems remaining on the macOS Tahoe 26 release line instead of upgrading to macOS 27. The update delivers security fixes without introducing major new user-facing functionality and provides a supported security update path during the transition to macOS 27.

26.6.2β†’26.7SecuritySep 14, 2026
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W11
Windows 11 β†—

Windows 11 26H1 KB5129194

Windows 11 build 28000.2956 (KB5129194) is an out-of-band security update released to address a Windows User-Mode Power Service elevation-of-privilege vulnerability and several significant issues introduced or exposed after the September 2026 cumulative update. It resolves Remote Desktop Services instability, Hyper-V Plan9 host-folder sharing failures with Linux virtual machines, and certain multichannel USB audio issues.

28000.2954β†’28000.2956SecurityEmergencyBug fixSep 14, 2026
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Windows Server 2025 β†—

Windows Server 2025 KB5129235

Windows Server 2025 build 26100.33451 (KB5129235) is an out-of-band non-security cumulative update released to address issues following the September 2026 security update. The primary enterprise fix resolves Remote Desktop Services instability that could cause RDP connection and sign-in failures, server unresponsiveness, and related management tools to stop responding. The update also fixes certain multichannel USB Audio Class 1.0 issues.

26100.33438β†’26100.33451EmergencyBug fixSep 14, 2026
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iPadOS β†—

iPadOS 26.7

iPadOS 26.7 is a security-focused maintenance update for iPad devices remaining on the iPadOS 26 release line instead of upgrading to iPadOS 27. The release provides security fixes without introducing major new user-facing features and allows organizations to maintain security coverage while completing compatibility testing for iPadOS 27.

26.6.2β†’26.7SecuritySep 14, 2026
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Windows Server 2022 β†—

Windows Server 2022 KB5129237

Windows Server 2022 build 20348.5631 (KB5129237) is an out-of-band cumulative update released to address issues following the September 2026 security update. Most notably, it resolves a Remote Desktop Services issue that could cause RDS instability, RDP connection and sign-in failures, server unresponsiveness, and related management tools to stop responding. The update includes the fixes and improvements from the September 8 cumulative update KB5122882.

20348.5622β†’20348.5631EmergencyBug fixSep 14, 2026
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IOS
iOS β†—

iOS 26.7

iOS 26.7 is a security-focused update for users who remain on the iOS 26 release line instead of upgrading to iOS 27. Apple’s release notes state that the update contains security fixes and does not introduce new user-facing features. The release was made available alongside iOS 27.

26.6.2β†’26.7SecuritySep 14, 2026
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Windows Server 2019 β†—

Windows Server 2019 KB5129238

Windows Server 2019 build 17763.9247 (KB5129238) is an out-of-band update released to resolve a Remote Desktop Services issue introduced by the September 2026 security update. Affected environments could experience RDS instability, failed RDP connections, sign-in problems, or servers becoming unresponsive during Remote Desktop configuration. The update incorporates the fixes and improvements from the September 8 security update KB5122876.

17763.9245β†’17763.9247EmergencyBug fixSep 14, 2026
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IOS
iOS β†—

iOS 26.6.2

iOS 26.6.2 is a targeted maintenance update that fixes an issue preventing software updates from being downloaded over a cellular data connection. Apple lists no published CVE entries for this release, so it should be classified as a bug-fix update rather than a security release.

26.6.1β†’26.6.2Bug fixSep 8, 2026
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W10
Windows 10 β†—

Windows 10 22H2 KB5122878

Windows 10 build 19045.7725 (KB5122878) is the September 2026 cumulative security update. It includes the latest Windows security fixes together with quality improvements affecting Secure Boot certificate deployment, Windows Code Integrity policies, Remote Desktop audio redirection, BitLocker Group Policy behavior, OMA DM logging, and time-zone handling. Microsoft reports no known issues with this update.

19045.7663β†’19045.7725SecurityBug fixSep 8, 2026
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W11
Windows 11 β†—

Windows 11 26H1 KB5124012

Windows 11 build 28000.2954 (KB5124012) is the September 2026 cumulative security update for Windows 11 version 26H1. It includes the latest Microsoft security fixes together with the features and quality improvements introduced in the August preview update. Key changes include expanded Secure Boot certificate deployment, fixes for Teams and Outlook crashes on Arm64 devices, Remote Desktop audio improvements, enhanced OMA-DM diagnostics, and updated AI components for Copilot+ PCs.

28000.2804β†’28000.2954SecurityFeatureBug fixPerformanceSep 8, 2026
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iPadOS β†—

iPadOS 26.6.2

iPadOS 26.6.2 is a targeted maintenance update that fixes an issue that could prevent software updates from being downloaded over a cellular data connection. No new user-facing features or security vulnerabilities are documented for this release.

26.6.1β†’26.6.2Bug fixSep 8, 2026
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W11
Windows 11 β†—

Windows 11 26H1 KB5120996

Windows 11 build 28000.2804 (KB5120996) is an optional non-security preview update for Windows 11 version 26H1. It introduces new and gradually rolled-out capabilities across File Explorer, Voice Access, Windows Hello, Search, accessibility, power management, and other Windows experiences, together with reliability and performance improvements for networking, printing, Remote Desktop, Explorer, sign-in, and Windows Update.

28000.2704β†’28000.2804FeatureBug fixPerformanceAug 27, 2026
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macOS β†—

macOS 26.6.2

macOS Tahoe 26.6.2 is a security-focused beta update currently being tested by Apple. The release contains security fixes only, with no new features or other changes disclosed. Apple has not yet provided details about the vulnerabilities addressed, and the update has not yet been released to the general public.

26.6.1β†’26.6.2SecurityAug 18, 2026
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iPadOS β†—

iPadOS 26.6.1

iPadOS 26.6.1 is a security-focused update addressing vulnerabilities in Audio, ImageIO, and WebKit. The fixes include an ImageIO vulnerability that could allow arbitrary code execution when processing a malicious image, as well as information disclosure, denial-of-service, browser crashes, and memory corruption issues. Apple states that these security fixes were first made available in the iPadOS 27 betas.

26.6β†’26.6.1SecurityAug 17, 2026
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IOS
iOS β†—

iOS 26.6.1

iOS 26.6.1 is a maintenance update focused on system stability, reliability, and bug fixes ahead of the upcoming iOS 27 release cycle. The update does not introduce major new user-facing features and is primarily intended to improve the overall iPhone experience and address issues identified in iOS 26.6.

26.6β†’26.6.1Bug fixPerformanceAug 17, 2026
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Windows Server 2025 β†—

Windows Server 2025 26100.33296

Windows Server 2025 Build 26100.33296 is the August 2026 cumulative security update for Microsoft's current Long-Term Servicing Channel (LTSC) server platform. The update delivers the latest Windows security protections together with cumulative quality and reliability improvements. Organizations running Windows Server 2025 should prioritize deployment after standard compatibility testing. Microsoft lists Windows Server 2025 as the current LTSC release.

26100.33158β†’26100.33296SecurityBug fixAug 12, 2026
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Windows Server 2022 β†—

Windows Server 2022 20348.5499

Windows Server 2022 Build 20348.5499 is the August 2026 cumulative security update, delivering Microsoft's latest security protections along with cumulative quality and reliability improvements. The update strengthens core operating system components and incorporates previous servicing fixes. Windows Server 2022 remains in extended support through October 14, 2031.

20348.5386β†’20348.5499SecurityBug fixAug 12, 2026
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Windows Server 2019 β†—

Windows Server 2019 17763.9121

Windows Server 2019 Build 17763.9121 (KB5120238) is the August 2026 cumulative security update. It delivers Microsoft's latest security protections together with cumulative quality and reliability improvements for Windows Server 2019. The update raises the OS build to 17763.9121 and should be prioritized on supported production servers after standard compatibility testing.

17763.9020β†’17763.9121SecurityBug fixAug 11, 2026
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W11
Windows 11 β†—

Windows 11 26H1 KB5121000

Windows 11 Build 28000.2704 (KB5121000) is the August 2026 cumulative security update for Windows 11 version 26H1. It includes the latest security fixes and incorporates quality improvements from the previous optional update, including enhancements to system reliability, File Explorer, Windows Update servicing, Remote Desktop, application compatibility, and general performance.

KB5121000SecurityBug fixPerformanceAug 11, 2026
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W10
Windows 10 β†—

Windows 10 22H2 KB5120249

Windows 10 Build 19045.7663 (KB5120249) is the August 2026 cumulative security update for Windows 10 version 22H2. The release delivers Microsoft's latest security fixes and cumulative quality improvements. Because standard Windows 10 22H2 support has ended, continued security servicing depends on applicable Extended Security Updates (ESU) or supported editions.

KB5120249SecurityBug fixAug 11, 2026
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macOS β†—

macOS 26.6.1

macOS Tahoe 26.6.1 is an important security update addressing an authentication vulnerability in Screen Sharing. The flaw could allow an attacker on the same network to authenticate to Screen Sharing without valid credentials. Apple recommends the update for all macOS Tahoe users.

26.6β†’26.6.1SecurityBug fixAug 6, 2026
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W11
Windows 11 β†—

Windows 11 26H1 KB5101681

Windows 11 Build 28000.2608 (KB5101681) is an optional non-security preview update for Windows 11 version 26H1. It introduces several gradually rolled-out improvements and delivers reliability and performance fixes across File Explorer, the Windows shell, Remote Desktop, graphics memory management, SMB backups, Windows Update, and other components. Microsoft reports no known issues with this release.

KB5101681FeatureBug fixPerformanceJul 28, 2026
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IOS
iOS β†—

iOS 26.6

iOS 26.6 is a maintenance release focused primarily on security improvements, bug fixes, and performance optimizations. The update resolves numerous security vulnerabilities, improves overall system stability, and optimizes Spotlight indexing to provide a smoother upgrade experience for the upcoming iOS 27 release.

26.5.2β†’26.6SecurityBug fixPerformanceJul 27, 2026
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macOS β†—

macOS 26.6

macOS Tahoe 26.6 is a maintenance release that delivers important security updates, bug fixes, and performance improvements. The update focuses on improving system reliability, addressing a large number of security vulnerabilities, and preparing Macs for the upcoming macOS 27 release. No major end-user features are included.

26.5.2β†’26.6SecurityBug fixPerformanceJul 27, 2026
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watchOS β†—

watchOS 26.6

watchOS 26.6 is a maintenance release that focuses on security updates, bug fixes, and overall system performance. The update does not introduce major new features but improves stability, reliability, and prepares Apple Watch devices for future watchOS releases.

26.5β†’26.6SecurityBug fixPerformanceJul 27, 2026
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iPadOS β†—

iPadOS 26.6

iPadOS 26.6 is a maintenance update that delivers important security fixes, bug fixes, and performance improvements for supported iPad models. The release focuses on improving system stability and reliability while addressing numerous security vulnerabilities. No major new features are included.

26.5.2β†’26.6SecurityBug fixPerformanceJul 27, 2026
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W11
Windows 11 β†—

Windows 11 26H1 KB5101649

Windows 11 KB5101649 is the July 2026 cumulative security update for version 26H1. It includes all improvements from the previous preview release, addresses the latest Microsoft security vulnerabilities, expands Secure Boot certificate deployment, strengthens Remote Desktop security, and improves Windows Update reliability.

KB5101649SecurityBug fixPerformanceJul 15, 2026
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Windows Server 2022 β†—

Windows Server 2022 KB5101646

Windows Server 2022 KB5101646 is the July 2026 cumulative security update. It delivers Microsoft's latest security fixes, expands Secure Boot certificate deployment, enhances Remote Desktop certificate validation, and includes cumulative quality, reliability, and servicing improvements for supported Windows Server 2022 systems.

KB5101646SecurityBug fixPerformanceJul 14, 2026
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Windows Server 2019 β†—

Windows Server 2019 KB5101645

Windows Server 2019 KB5101645 is the July 2026 cumulative security update. It delivers Microsoft's latest security fixes, improves Secure Boot and Remote Desktop security, and includes cumulative quality, reliability, and servicing improvements for supported Windows Server 2019 systems.

KB5101645SecurityBug fixPerformanceJul 14, 2026
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Windows Server 2025 β†—

Windows Server 2025 KB5101650

Windows Server 2025 KB5101650 is the July 2026 cumulative security update. It includes Microsoft's latest security fixes, improves Secure Boot certificate deployment, enhances Remote Desktop security, updates AI-related system components, and delivers cumulative quality, reliability, and servicing improvements.

KB5101650SecurityBug fixPerformanceJul 14, 2026
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W10
Windows 10 β†—

Windows 10 22H2 KB5101648

Windows 10 KB5101648 is the July 2026 cumulative security update for Windows 10 Version 22H2. It includes the latest Microsoft security fixes, cumulative quality improvements, Secure Boot enhancements, and servicing stack updates to improve system reliability and update performance.

KB5101648SecurityBug fixPerformanceJul 14, 2026
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Debian β†—

Debian 13.6

Debian 13.6 is the sixth point release of Debian 13 "Trixie". It bundles all security updates released since Debian 13.5 together with numerous fixes for important bugs. This release is intended for new installation media and does not represent a new Debian version.

13.5β†’13.6SecurityBug fixJul 12, 2026
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iPadOS β†—

iPadOS 26.5.2

iPadOS 26.5.2 is a security-focused maintenance update that addresses multiple vulnerabilities affecting the kernel, WebKit, graphics subsystem, and other core operating system components. Apple recommends installing the update on all supported iPads to improve security and system stability.

26.5.1β†’26.5.2SecurityBug fixJun 29, 2026
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IOS
iOS β†—

iOS 26.5.2

iOS 26.5.2 is a security-focused maintenance update that addresses multiple vulnerabilities affecting the kernel, graphics subsystem, WebKit, and other core components. Apple recommends installing the update on all supported devices to improve security and system stability.

26.5.1β†’26.5.2SecurityBug fixJun 29, 2026
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macOS β†—

macOS 26.5.2

macOS Tahoe 26.5.2 is a security-focused maintenance update that addresses multiple vulnerabilities in the operating system, including kernel and graphics subsystem issues. Apple recommends installing the update as soon as possible to improve system security and stability.

26.5.1β†’26.5.2SecurityBug fixJun 29, 2026
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Windows Server 2025 β†—

Windows Server 2025 KB5060829

Windows Server 2025 KB5060829 is an optional preview update that introduces quality improvements, servicing enhancements, and performance optimizations. The release also updates AI-related components, improves accessibility, and resolves multiple reliability issues in preparation for the next cumulative security update.

KB5060829FeatureBug fixPerformanceJun 24, 2026
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W11
Windows 11 β†—

Windows 11 26H1 KB5095091

Windows 11 KB5095091 is an optional preview update for version 26H1. It introduces accessibility improvements, updates several AI components, includes servicing stack enhancements, and delivers cumulative quality, stability, and performance improvements ahead of the next monthly security release.

KB5095091FeatureBug fixPerformanceJun 23, 2026
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AN
Android β†—

Android 17

Android 17 introduces new productivity features, enhanced multitasking, improved gaming experiences for foldables and tablets, stronger privacy protections, and multiple security enhancements. The release also includes platform optimizations and bug fixes aimed at improving overall system performance and reliability.

16β†’17SecurityFeatureBug fixPerformanceJun 16, 2026
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Windows Server 2019 β†—

Windows Server 2019 KB5094123

Windows Server 2019 KB5094123 is the June 2026 cumulative security update. It delivers the latest Microsoft security fixes, improves Secure Boot status reporting, adds additional Secure Boot policy controls, and includes cumulative quality, reliability, and servicing improvements for supported Windows Server 2019 systems.

KB5094123SecurityBug fixPerformanceJun 9, 2026
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Windows Server 2022 β†—

Windows Server 2022 KB5094128

Windows Server 2022 KB5094128 is the June 2026 cumulative security update. It delivers Microsoft's latest security fixes, expands Secure Boot certificate deployment, improves Windows Security reporting, and includes cumulative quality, reliability, and performance improvements for supported Windows Server 2022 systems.

KB5094128SecurityBug fixPerformanceJun 9, 2026
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W10
Windows 10 β†—

Windows 10 22H2 KB5094127

Windows 10 KB5094127 is the June 2026 cumulative security update for Windows 10 22H2. It delivers the latest security fixes, improves File Explorer search functionality, introduces additional security hardening for folder customization, and includes cumulative quality and reliability improvements for supported Windows 10 ESU devices

KB5094127SecurityBug fixPerformanceJun 9, 2026
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watchOS β†—

watchOS 26.5

watchOS 26.5 introduces the new Pride Luminance watch face, fixes messaging issues affecting dual SIM users, and delivers important security updates and stability improvements for Apple Watch.

26.4β†’26.5SecurityFeatureBug fixMay 11, 2026
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UB
Ubuntu β†—

Ubuntu 26.04

Ubuntu 26.04 LTS is Canonical's latest Long Term Support release, providing five years of standard support. It introduces updated core packages, a newer Linux kernel, GNOME desktop enhancements, improved installer experience, updated development tools, and broad hardware enablement while focusing on long-term stability and enterprise readiness.

25.10β†’26.04 LTSFeatureBug fixPerformanceApr 23, 2026
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