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When does the iMac (Retina 5K, 27-inch, 2020) stop getting updates?

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

Quick look

Newest macOS it runs
macOS Tahoe 262newest 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
Released
4 August 20204Available online; Apple gave no in-store day
Releases since launch
7macOS releases since 4 August 2020
Releases newer than its newest macOS
1release newer than its newest macOSGolden Gate

Software support

Basis
our inference from history5
Security support for Tahoe, as endoflife.date lists it
Not available6

Earlier iMac 27-inch models

Security support listed, from release to end.7

iMac (Retina 5K, 27-inch, 2017)

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

iMac (Retina 5K, 27-inch, Late 2015)

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

iMac (Retina 5K, 27-inch, Late 2014)

Newest macOS
Big Sur
Security support end (endoflife.date)
2 February 2026
From release
11 years 3 months (from online availability)

Apple’s pattern

New macOS
One a year
Patched in recent years
The two releases before the newest8
Older releases
Sometimes patched for longer8
That pattern would put the end of Tahoe around
autumn 20288

More on this Mac

Sources

  1. endoflife.date — Apple macOS · Default for iMac (Retina 5K, 27-inch, 2020) · third-party figure · read 2 Oct 2026

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  2. Apple Support (UK) — macOS Tahoe 26 is compatible with these computers · Apple’s figure · read 22 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) — 27-inch iMac gets a major update · Apple’s figure · read 22 Sep 2026

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  5. The newest macOS Apple lists this Mac for is macOS Tahoe 26; Apple’s macOS 27 Golden Gate list does not name it. endoflife.date shows Tahoe 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 2028; that is an inference, not a commitment. Source: endoflife.date. Read 22 Sep 2026

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

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  7. The three most recent earlier releases in this line with a recorded end are shown. 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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  8. 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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