From Newsgroup: comp.sys.mac.advocacy

PSA: How many major OS releases does Apple fully support at once?

Out of a million Apple owners, only about 3 understand Apple releases.
I'm one of those three people, but this PSA is to help you understand also.

This PSA is intended to clear up a long-standing point of confusion about
how Apple handles iOS and macOS security updates. While this information
has been provided to you a thousand times, people still get it wrong.
From: Chris <ithinkiam@gmail.com>
Newsgroups: misc.phone.mobile.iphone,comp.sys.mac.advocacy
Subject: Re: How long did the iPhone X actually get full iOS support?
Date: Thu, 19 Mar 2026 21:13:11 -0000 (UTC)
Message-ID: <10phot7$125qs$1@dont-email.me>

> An example is Apple has never in its history fully supported
> more than one concurrent major release...

False.

For iOS, Apple fully supports two versions at every new release between
September and December.

For macOS, Apple fully supports three concurrent versions.

Chris is wrong. Dead wrong. And that's fine, as long as Chris can learn.
Every macOS or iOS owner should understand how Apple patches releases.

So let's settle it using Apple's own documentation, Apple's own words,
and Apple's own published security data.

Here is the question:

Q: How many major OS releases does Apple fully support at once?
A: ?

Below is the answer, taken directly from Apple, not from me, not from
blogs, not from speculation.

Apple's own Platform Security Guide states, verbatim:

"Not all known security issues are addressed in previous versions."

Source: Apple Platform Security Guide
<https://support.apple.com/guide/security/sec87fc038c2/web>

That single sentence is Apple's official admission that:
a. Only the newest major OS receives *all* security patches.
b. The previous major OS receives *some* patches.
c. Older OS versions may receive *none* of the known fixes.

This is not interpretation. This is Apple's own policy.
You can verify this yourself in Apple's own CVE listings:

Apple Security Updates (HT201222)
<https://support.apple.com/en-us/HT201222>

Pick any recent set of patches and compare them. You will see:
a. The newest OS gets the full set of CVEs.
b. The previous major OS usually gets only a subset.
c. Older OS's often get nothing at all.

This is not speculation. This is Apple's own data.

Every "About the security content of..." page (HT201224) shows the same pattern. Apple patches a vulnerability in the newest OS, but the same vulnerability is missing from the older OS listings, even when those
older OS versions are still "supported."

Again, this is Apple's behavior, not mine.
Independent reporting simply summarizes what Apple already documented:

a. ScreenRant:
<https://screenrant.com/apple-product-security-update-lifespan/>

b. HotHardware:
<https://hothardware.com/news/apple-admits-only-fully-patches-security-flaws-in-latest-os-releases>

c. Ars Technica:
<https://arstechnica.com/gadgets/2022/10/apple-clarifies-security-update-policy-only-the-latest-oses-are-fully-patched/>

None of these articles are inventing anything. They are quoting Apple.
Apple's deployment documentation reinforces the same policy:

About Software Updates:
<https://support.apple.com/guide/deployment/about-software-updates-depc4c80847a>

Apple expects organizations to migrate to the newest OS for full
security coverage. Older OS versions receive updates, but not full
parity. Apple has never claimed otherwise.

So here is the factual answer to the question:

Q: How many major OS releases does Apple fully support at once?
A: Apple fully supports exactly ONE major OS release at any time.

Not two. Not three. But only one. Just one. Never more than one.

This is Apple's documented policy.
a. It is visible in Apple's own CVE tables.
b. It is confirmed in Apple's own security guide.
c. It is reflected in Apple's own update behavior.

This PSA is not about opinions or preferences. It is about understanding
what Apple actually wrote, and observing what Apple actually does.

Discussion is welcome, but please base your replies on Apple's published documentation and Apple's published security data. If you believe Apple
fully supports more than one major OS release at a time, then please
cite Apple's documentation that says so.

Out of a million Apple owners, only a handful understand how Apple's
release and hotfix system actually works. Let's fix that.
--- Synchronet 3.21d-Linux NewsLink 1.2

From Newsgroup: comp.sys.mac.advocacy

On 20/03/2026 00:14, Maria Sophia wrote:

PSA: How many major OS releases does Apple fully support at once?

Out of a million Apple owners, only about 3 understand Apple releases.
I'm one of those three people, but this PSA is to help you understand also.

This PSA is intended to clear up a long-standing point of confusion about
how Apple handles iOS and macOS security updates. While this information
has been provided to you a thousand times, people still get it wrong.
From: Chris <ithinkiam@gmail.com>
Newsgroups: misc.phone.mobile.iphone,comp.sys.mac.advocacy
Subject: Re: How long did the iPhone X actually get full iOS support?
Date: Thu, 19 Mar 2026 21:13:11 -0000 (UTC)
Message-ID: <10phot7$125qs$1@dont-email.me>

> An example is Apple has never in its history fully supported
> more than one concurrent major release...

False.

For iOS, Apple fully supports two versions at every new release between
September and December.

For macOS, Apple fully supports three concurrent versions.

Chris is wrong.

You're going back to your bad old tricks. Stop exploiting subthreads for
your own self-gratification.

If you can't respond respectfully within the subthread then don't
respond at all.

No one cares about your "PSAs".
--- Synchronet 3.21d-Linux NewsLink 1.2

From Newsgroup: comp.sys.mac.advocacy

Chris wrote:

No one cares about your "PSAs".

I get it that you don't like the subject matter, but the fact remains that Apple is the only consumer OS vendor who has never in its entire history
ever fully supported more than a single major OS release with complete
security patches.
--- Synchronet 3.21d-Linux NewsLink 1.2

From Newsgroup: comp.sys.mac.advocacy

On 3/20/26 9:11 AM, Maria Sophia wrote:

Chris wrote:

No one cares about your "PSAs".

I get it that you don't like the subject matter, but the fact remains that Apple is the only consumer OS vendor who has never in its entire history
ever fully supported more than a single major OS release with complete security patches.

That's a minor complaint compared to many "budget" Android devices that
never get an OS update and complete security updates seldom, if ever.
--- Synchronet 3.21d-Linux NewsLink 1.2

From Newsgroup: comp.sys.mac.advocacy

On 3/20/26 9:33 AM, Tom Elam wrote:

On 3/20/26 9:11 AM, Maria Sophia wrote:

Chris wrote:

No one cares about your "PSAs".

I get it that you don't like the subject matter, but the fact remains
that
Apple is the only consumer OS vendor who has never in its entire history
ever fully supported more than a single major OS release with complete
security patches.

That's a minor complaint compared to many "budget" Android devices that never get an OS update and complete security updates seldom, if ever.

Reply to my own post -

Motorola phones typically get only 1 OS update and 2-5 years of security updates. Then nothing. Also typical time frames for for Nokia and OnePlus.

Samsung is hardly = Android.

Meanwhile, iPhone XS/XS Max launched 9/21/18 is still getting security updates.

I repeat, lack up updates is a major reason I left Android.
--- Synchronet 3.21d-Linux NewsLink 1.2

From Newsgroup: comp.sys.mac.advocacy

Tom Elam wrote:

Motorola phones typically get only 1 OS update and 2-5 years of security updates. Then nothing. Also typical time frames for for Nokia and OnePlus.

Samsung is hardly = Android.

Meanwhile, iPhone XS/XS Max launched 9/21/18 is still getting security updates.

I repeat, lack up updates is a major reason I left Android.

Hi Tom,

Notice you left Android, you say, for lack of updates.

But it's clearly & obviously Apple who lacks the updates when you compare
with the direct competitors to the Apple iPhone and to the Apple iPads.

See my other post to your information where I do not disagree with you that Android has an ecosystem filled to the brim with $39.99 budget phones.

And those budget phones do not have the kind of support that the direct competitors to the iPhone have, namely these are the main competitors:
a. Galaxy S/Note series for phones
b. Galaxy Tab S series for tablets

Since you left Android for "lack of updates", maybe you should return.
1. Those devices have far longer full hotfix support than Apple does
2. Those devices concurrently support more major releases than Apple does
2. All Android 10+ devices get monthly core module updates forever

If you disagree, please respond to those three facts I raised above.
--- Synchronet 3.21d-Linux NewsLink 1.2

From Newsgroup: comp.sys.mac.advocacy

Tom Elam wrote:

On 3/20/26 9:11 AM, Maria Sophia wrote:

Chris wrote:

No one cares about your "PSAs".

I get it that you don't like the subject matter, but the fact remains that >> Apple is the only consumer OS vendor who has never in its entire history
ever fully supported more than a single major OS release with complete
security patches.

That's a minor complaint compared to many "budget" Android devices that never get an OS update and complete security updates seldom, if ever.

Hi Tom,

It's not a "complaint"; it's simply a fact.

And the fact is Apple's written promised support, which the UK extracted
out of Apple, by law, happens to be shorter than that of its competition.

And it happens to cover fewer concurrent releases.
And there is no concept of monthly updates forever for all recent devices.

However...

I never disagree with anyone who makes a sensibly logical statement.
So I agree with you that $39.99 budget Androids have lousy full support.

But on an Apple iPhone and iPad newsgroup, the devices to compare to are
the direct competitors to the iPhone & to the iPad. That's Samsung.

Specifically that's Samsung's high-end Galaxy series devices.
a. Galaxy S/Note series for phones
b. Galaxy Tab S series for tablets
--- Synchronet 3.21d-Linux NewsLink 1.2

From Newsgroup: comp.sys.mac.advocacy

On 2026-03-20 13:33:53 +0000, Tom Elam said:

On 3/20/26 9:11 AM, Maria Sophia wrote:

Chris wrote:

No one cares about your "PSAs".

I get it that you don't like the subject matter, but the fact remains that >> Apple is the only consumer OS vendor who has never in its entire history
ever fully supported more than a single major OS release with complete
security patches.

That's a minor complaint compared to many "budget" Android devices that never get an OS update and complete security updates seldom, if ever.

It's just the usual complete and utter know-nothing anti-Apple bollocks
by the brainless troll "Arlen" / "Maria" / "Marian" who hasn't got a
single clue about *anything* at all, let alone Apple products. :-\

Just ignore / killfile the ignorant moron.

--- Synchronet 3.21d-Linux NewsLink 1.2

From Newsgroup: comp.sys.mac.advocacy

Your Name wrote:

Just ignore / killfile the ignorant moron.

The fact you desire to be woefully ignorant of how Apple major releases
work is one thing, but why do you attack intelligent people simply for discussing a basic question about iOS release strategy on an Apple ng?
--- Synchronet 3.21d-Linux NewsLink 1.2