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When does the iMac (Retina 4K, 21.5-inch, 2019) stop getting updates?

Each figure is from the source marked1 unless it carries its own number.

Quick look

Newest macOS it runs
macOS Sequoia2newest macOS Apple lists it for
Current macOS
macOS 27 Golden Gatecurrent macOSReleased 14 September 2026
Security updates
Not available3Security updates until
Feature updates
Not available3Feature updates until
Shipped with
macOS Mojave4shipped with
Released
19 March 20195Available online; Apple gave no in-store day
Releases since launch
Not available6macOS releases since it launched
Releases newer than its newest macOS
2releases newer than its newest macOSTahoe and Golden Gate

Software support

Basis
our inference from history7
Security support for Sequoia, as endoflife.date lists it
Not available8

Earlier iMac 21.5-inch models

Security support listed, from release to end.9

iMac (21.5-inch, 2017)

Newest macOS
Ventura
Security support end (endoflife.date)
15 September 2025
From release
8 years 3 months

iMac (21.5-inch, Late 2015)

Newest macOS
Monterey
Security support end (endoflife.date)
16 September 2024
From release
8 years 11 months

Apple’s pattern

New macOS
One a year
Patched in recent years
The two releases before the newest10
Older releases
Sometimes patched for longer10
That pattern would put the end of Sequoia around
autumn 202710

More on this Mac

Sources

  1. endoflife.date — Apple macOS · Default for iMac (Retina 4K, 21.5-inch, 2019) · third-party figure · read 2 Oct 2026

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  2. Apple Support (UK) — Identify your iMac model · Apple’s figure · read 15 Sep 2026

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  3. Not published by Apple. Apple has never published a date when a Mac stops getting macOS or security updates, and this site does not invent one. Checked: endoflife.date. Read 22 Sep 2026

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  4. Apple Newsroom (UK) — iMac gets a 2x performance boost · Apple’s figure · read 9 Oct 2026

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  5. Apple Newsroom (UK) — iMac gets a 2x performance boost · Apple’s figure · read 22 Sep 2026

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  6. Not counted: the iMac (Retina 4K, 21.5-inch, 2019) launched before 7 October 2019, the oldest release in the list.

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  7. The newest macOS Apple lists this Mac for is macOS Sequoia; Apple’s macOS 27 Golden Gate list does not name it. endoflife.date shows Sequoia still receiving security updates on 22 September 2026. Apple’s habit of patching the two releases before the newest points to those updates ending around autumn 2027; that is an inference, not a commitment. Source: endoflife.date. Read 22 Sep 2026

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  8. endoflife.date records no end to security support for Sequoia. Checked: endoflife.date. Read 2 Oct 2026

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  9. Every earlier release in this line with a recorded end is shown. A row can stand for two Macs launched together on the same macOS. Each span runs from release to the end of security updates for the newest macOS that Mac ran, as endoflife.date lists it: its cycle end, not necessarily Apple’s last patch. Only Macs with a release day are listed; one known only by an announcement or a month is left out. Where Apple’s date is the day the Mac could be ordered online, the row says so. This is precedent, not a prediction. Apple publishes no date when a Mac stops getting macOS or security updates.

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  10. An inference from Apple’s past releases, not a commitment from Apple, which publishes no date when a Mac stops getting macOS or security updates. A Mac missing from a new macOS compatibility list is not supported by that release; this page changes when that list does.

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