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Release appearance

macOS 10.11 Public

Full article
Public release

Recorded context

About this appearance

OS X El Capitan 10.11 reached the public channel on September 30, 2015 with windowing, search, app, graphics, language, compatibility, and security changes.

Date
Sep 30, 2015
Availability
available
Revision
No

Release notes

What changed

Original editorial synthesis. Linked references appear with the claims they support and in the source ledger.

Public release

Apple made OS X El Capitan available from the Mac App Store as a free update on September 30, 2015. Apple's dated security index carries the same public date.[1][2]

Documented scope

The structured entries synthesize Apple's launch announcement and version-specific security record. They exclude beta-only behavior, later El Capitan point releases, and unverified performance generalizations.[3][4]

Source ledger

References

Sources are linked to the claims they support. Publication and access dates are shown when available.

  1. Apple security updates (2015)

    Apple Support · Apple · 2023-11-06T00:00:00.000Z · OS X El Capitan 10.11 — 30 Sep 2015

    Back to text ↑
  2. OS X El Capitan Available as a Free Update Tomorrow

    Apple Newsroom · Apple · 2015-09-29T00:00:00.000Z · Pricing & Availability

    Back to text ↑
  3. About the security content of OS X El Capitan v10.11

    Apple Support · Apple · 2023-11-03T00:00:00.000Z · OS X El Capitan v10.11 security content

    Back to text ↑
  4. OS X El Capitan Available as a Free Update Tomorrow

    Apple Newsroom · Apple · 2015-09-29T00:00:00.000Z · Refinements through Pricing & Availability

    Back to text ↑
  5. About the security content of OS X El Capitan v10.11

    Apple Support · Apple · 2023-11-03T00:00:00.000Z · AirScan; Certificate Trust Policy; CFNetwork Cookies through SSL; CoreCrypto; Heimdal; Multipeer Connectivity

  6. About the security content of OS X El Capitan v10.11

    Apple Support · Apple · 2023-11-03T00:00:00.000Z · Audio; CoreText; Disk Images; Finder; Mail; Notes; OpenSSH; OpenSSL; Ruby; SQLite; Terminal; Time Machine

  7. OS X El Capitan Available as a Free Update Tomorrow

    Apple Newsroom · Apple · 2015-09-29T00:00:00.000Z · Built-in apps — Mail

  8. OS X El Capitan Available as a Free Update Tomorrow

    Apple Newsroom · Apple · 2015-09-29T00:00:00.000Z · Built-in apps — Notes

  9. OS X El Capitan Available as a Free Update Tomorrow

    Apple Newsroom · Apple · 2015-09-29T00:00:00.000Z · Built-in apps — Photos

  10. OS X El Capitan Available as a Free Update Tomorrow

    Apple Newsroom · Apple · 2015-09-29T00:00:00.000Z · Built-in apps — Safari

  11. About the security content of OS X El Capitan v10.11

    Apple Support · Apple · 2023-11-03T00:00:00.000Z · Dev Tools through Kernel; Install Framework Legacy; graphics, HID, storage, SMB, and NetworkExtension entries

  12. OS X El Capitan Available as a Free Update Tomorrow

    Apple Newsroom · Apple · 2015-09-29T00:00:00.000Z · Enhanced international language support

  13. OS X El Capitan Available as a Free Update Tomorrow

    Apple Newsroom · Apple · 2015-09-29T00:00:00.000Z · Improvements to System Performance — Metal

  14. OS X El Capitan Available as a Free Update Tomorrow

    Apple Newsroom · Apple · 2015-09-29T00:00:00.000Z · Notes and iCloud

  15. OS X El Capitan Available as a Free Update Tomorrow

    Apple Newsroom · Apple · 2015-09-29T00:00:00.000Z · Pricing & Availability; footnote

  16. OS X El Capitan Available as a Free Update Tomorrow

    Apple Newsroom · Apple · 2015-09-29T00:00:00.000Z · Refinements to the Mac Experience

  17. OS X El Capitan Available as a Free Update Tomorrow

    Apple Newsroom · Apple · 2015-09-29T00:00:00.000Z · September 29 announcement; September 30 availability

  18. OS X El Capitan Available as a Free Update Tomorrow

    Apple Newsroom · Apple · 2015-09-29T00:00:00.000Z · Split View

  19. OS X El Capitan Available as a Free Update Tomorrow

    Apple Newsroom · Apple · 2015-09-29T00:00:00.000Z · Spotlight natural-language search

  20. OS X El Capitan Available as a Free Update Tomorrow

    Apple Newsroom · Apple · 2015-09-29T00:00:00.000Z · Spotlight

Release changes

Changed in this release

Features, fixes, removals, and regressions first observed in this release record.

security · fixed

Content parsing and built-in app security repairs

documentedconfirmed

Apple's record includes input-validation, memory-safety, privacy, code-signing, and information-disclosure fixes across documents, communications, web-adjacent content, and system tools.

  1. [1] About the security content of OS X El Capitan v10.11 · Audio; CoreText; Disk Images; Finder; Mail; Notes; OpenSSH; OpenSSL; Ruby; SQLite; Terminal; Time Machine

enhancement · changed

Rich content, checklists, and attachment browsing in Notes

documentedconfirmed

A note could contain photos, PDFs, videos, web links, map locations, and task lists, with attachments collected into a searchable visual view.

  1. [1] OS X El Capitan Available as a Free Update Tomorrow · Built-in apps — Notes

feature · introduced

Natural-language Spotlight queries

documentedconfirmed

Users could describe a document by sender, date, or recent work context and adjust the search panel to accommodate more results.

  1. [1] OS X El Capitan Available as a Free Update Tomorrow · Spotlight natural-language search

developerApi · introduced

Metal graphics technology on Mac

documentedconfirmed

Apple integrated its lower-overhead graphics technology with Core Animation and Core Graphics and exposed it to supported games and professional software.

  1. [1] OS X El Capitan Available as a Free Update Tomorrow · Improvements to System Performance — Metal

security · fixed

Networking, certificate, and cryptography repairs

documentedconfirmed

Apple's advisory records stronger validation and state handling across secure transport, private browsing, credential, proxy, and network data paths.

  1. [1] About the security content of OS X El Capitan v10.11 · AirScan; Certificate Trust Policy; CFNetwork Cookies through SSL; CoreCrypto; Heimdal; Multipeer Connectivity

security · fixed

Kernel, driver, firmware, and privilege repairs

documentedconfirmed

The documented repairs span memory handling, entitlement checks, pointer exposure, firmware-update boundaries, privileged executables, and local attack surfaces.

  1. [1] About the security content of OS X El Capitan v10.11 · Dev Tools through Kernel; Install Framework Legacy; graphics, HID, storage, SMB, and NetworkExtension entries

enhancement · changed

Streamlined Mission Control and Spaces creation

documentedconfirmed

El Capitan revised the overview workspace to reduce window overlap and made it more direct to separate crowded work into another desktop.

  1. [1] OS X El Capitan Available as a Free Update Tomorrow · Refinements to the Mac Experience

compatibility · changed

2009-and-later Mac compatibility baseline

documentedconfirmed

The launch announcement defined a broad hardware eligibility range while noting that individual features were not available on every device.

  1. [1] OS X El Capitan Available as a Free Update Tomorrow · Pricing & Availability; footnote

enhancement · changed

Chinese and Japanese text improvements

documentedconfirmed

The release expanded typography and input assistance for Traditional and Simplified Chinese and reduced manual confirmation during Japanese text conversion.

  1. [1] OS X El Capitan Available as a Free Update Tomorrow · Enhanced international language support

enhancement · changed

Mail swipe and full-screen composition improvements

documentedconfirmed

The release aligned message triage with familiar swipe behavior and made full-screen email composition less restrictive.

  1. [1] OS X El Capitan Available as a Free Update Tomorrow · Built-in apps — Mail

enhancement · changed

Photos organization and editing extensions

documentedconfirmed

The library gained stronger metadata and sorting controls while allowing compatible external editors to participate in the Photos workflow.

  1. [1] OS X El Capitan Available as a Free Update Tomorrow · Built-in apps — Photos