Apple's macOS full support is a *lot* shorter than most people "think" it is

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Sujet : Apple's macOS full support is a *lot* shorter than most people "think" it is
De : mariasophia (at) *nospam* comprehension.com (Maria Sophia)
Groupes : misc.phone.mobile.iphone comp.sys.mac.system comp.sys.mac.advocacy
Date : 27. Mar 2026, 21:27:05
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Organisation : BWH Usenet Archive (https://usenet.blueworldhosting.com)
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Apple's macOS full support is a *lot* shorter than most people "think" it
is, but it's not as easily calculated as iOS is, so the list below starts
on March 24, 2001 and uses the full-release ending date as simply the date
of the next release (and not of the earlier last-known full patch).

With those clarifications in mind, here is the actual macOS full support.

1. OS X 10.0 was released on March 24, 2001
2. The next release was OS X 10.1 on September 25, 2001
3. That is 185 days, or 0.51 years of full macOS software support

1. OS X 10.1 was released on September 25, 2001
2. The next release was OS X 10.2 on August 23, 2002
3. That is 332 days, or 0.91 years of full macOS software support

1. OS X 10.2 was released on August 23, 2002
2. The next release was OS X 10.3 on October 24, 2003
3. That is 427 days, or 1.17 years of full macOS software support

1. OS X 10.3 was released on October 24, 2003
2. The next release was OS X 10.4 on April 29, 2005
3. That is 553 days, or 1.51 years of full macOS software support

1. OS X 10.4 was released on April 29, 2005
2. The next release was OS X 10.5 on October 26, 2007
3. That is 910 days, or 2.49 years of full macOS software support

1. OS X 10.5 was released on October 26, 2007
2. The next release was OS X 10.6 on August 28, 2009
3. That is 672 days, or 1.84 years of full macOS software support

1. OS X 10.6 was released on August 28, 2009
2. The next release was OS X 10.7 on July 20, 2011
3. That is 691 days, or 1.89 years of full macOS software support

1. OS X 10.7 was released on July 20, 2011
2. The next release was OS X 10.8 on July 25, 2012
3. That is 371 days, or 1.02 years of full macOS software support

1. OS X 10.8 was released on July 25, 2012
2. The next release was OS X 10.9 on October 22, 2013
3. That is 454 days, or 1.24 years of full macOS software support

1. OS X 10.9 was released on October 22, 2013
2. The next release was OS X 10.10 on October 16, 2014
3. That is 359 days, or 0.98 years of full macOS software support

1. OS X 10.10 was released on October 16, 2014
2. The next release was OS X 10.11 on September 30, 2015
3. That is 349 days, or 0.96 years of full macOS software support

1. OS X 10.11 was released on September 30, 2015
2. The next release was macOS 10.12 on September 20, 2016
3. That is 356 days, or 0.98 years of full macOS software support

1. macOS 10.12 was released on September 20, 2016
2. The next release was macOS 10.13 on September 25, 2017
3. That is 370 days, or 1.01 years of full macOS software support

1. macOS 10.13 was released on September 25, 2017
2. The next release was macOS 10.14 on September 24, 2018
3. That is 364 days, or 1.00 years of full macOS software support

1. macOS 10.14 was released on September 24, 2018
2. The next release was macOS 10.15 on October 7, 2019
3. That is 378 days, or 1.04 years of full macOS software support

1. macOS 10.15 was released on October 7, 2019
2. The next release was macOS 11 on November 12, 2020
3. That is 402 days, or 1.10 years of full macOS software support

1. macOS 11 was released on November 12, 2020
2. The next release was macOS 12 on October 25, 2021
3. That is 347 days, or 0.95 years of full macOS software support

1. macOS 12 was released on October 25, 2021
2. The next release was macOS 13 on October 24, 2022
3. That is 364 days, or 1.00 years of full macOS software support

1. macOS 13 was released on October 24, 2022
2. The next release was macOS 14 on September 26, 2023
3. That is 337 days, or 0.92 years of full macOS software support

1. macOS 14 was released on September 26, 2023
2. The next release was macOS 15 on September 16, 2024
3. That is 356 days, or 0.98 years of full macOS software support

Since this is a first pass, we should check for details.
So far, this seems to be a reasonably accurate summary of facts.

Apple's FULL security-update behavior for *full* macOS software support
 a. Longest full macOS software support was 2.49 years (OS X 10.4 Tiger)
 b. Shortest full macOS software support was 0.51 years (OS X 10.0 Cheetah)
 c. Average full macOS software support was 1.18 years (20 versions)
 d. Typical full macOS software support was ~1.0-1.5 years

Date Sujet#  Auteur
27 Mar 26 * Apple's macOS full support is a *lot* shorter than most people "think" it is32Maria Sophia
27 Mar 26 +* Re: Apple's macOS full support is a *lot* shorter than most people "think" it is30Tom Elam
28 Mar 26 i`* Re: Apple's macOS full support is a *lot* shorter than most people "think" it is29Your Name
28 Mar 26 i +* Re: Apple's macOS full support is a *lot* shorter than most people "think" it is26Maria Sophia
28 Mar 26 i i+* Re: Apple's macOS full support is a *lot* shorter than most people "think" it is3Tom Elam
28 Mar 26 i ii+- Re: Apple's macOS full support is a *lot* shorter than most people "think" it is1Maria Sophia
28 Mar 26 i ii`- Re: Apple's macOS full support is a *lot* shorter than most people "think" it is1Your Name
28 Mar 26 i i`* Re: Apple's macOS full support is a *lot* shorter than most people "think" it is22Tom Elam
28 Mar 26 i i `* Re: Apple's macOS full support is a *lot* shorter than most people "think" it is21Maria Sophia
29 Mar 26 i i  `* Re: Apple's macOS full support is a *lot* shorter than most people "think" it is20Tom Elam
29 Mar 26 i i   `* Re: Apple's macOS full support is a *lot* shorter than most people "think" it is19Your Name
30 Mar 26 i i    +* Re: Apple's macOS full support is a *lot* shorter than most people "think" it is16Tom Elam
30 Mar 26 i i    i`* Re: Apple's macOS full support is a *lot* shorter than most people "think" it is15Maria Sophia
31 Mar 26 i i    i `* Re: Apple's macOS full support is a *lot* shorter than most people "think" it is14Jolly Roger
31 Mar 26 i i    i  `* Re: Apple's macOS full support is a *lot* shorter than most people "think" it is13Maria Sophia
31 Mar 26 i i    i   +- Re: Apple's macOS full support is a *lot* shorter than most people "think" it is1Maria Sophia
2 Apr 26 i i    i   `* Re: Apple's macOS full support is a *lot* shorter than most people "think" it is11Jolly Roger
2 Apr 26 i i    i    `* Re: Apple's macOS full support is a *lot* shorter than most people "think" it is10Maria Sophia
2 Apr 26 i i    i     +* He sounds like Trump! (was Re: Apple's macOS full support is a *lot* shorter than most people "think" it is3Alan
2 Apr 26 i i    i     i`* Re: He sounds like Trump! (was Re: Apple's macOS full support is a *lot* shorter than most people "think" it is2Jolly Roger
3 Apr 26 i i    i     i `- Re: He sounds like Trump! (was Re: Apple's macOS full support is a *lot* shorter than most people "think" it is1Maria Sophia
2 Apr 26 i i    i     `* Re: Apple's macOS full support is a *lot* shorter than most people "think" it is6Jolly Roger
2 Apr 26 i i    i      +- Re: Apple's macOS full support is a *lot* shorter than most people "think" it is1Alan
3 Apr 26 i i    i      `* Re: Apple's macOS full support is a *lot* shorter than most people "think" it is4Maria Sophia
3 Apr 26 i i    i       `* Re: Apple's macOS full support is a *lot* shorter than most people "think" it is3Jolly Roger
3 Apr 26 i i    i        `* Re: Apple's macOS full support is a *lot* shorter than most people "think" it is2Maria Sophia
4 Apr 26 i i    i         `- Re: Apple's macOS full support is a *lot* shorter than most people "think" it is1Jolly Roger
30 Mar 26 i i    `* Re: Apple's macOS full support is a *lot* shorter than most people "think" it is2Tom Elam
30 Mar 26 i i     `- Re: Apple's macOS full support is a *lot* shorter than most people "think" it is1Maria Sophia
28 Mar 26 i +- Re: Apple's macOS full support is a *lot* shorter than most people "think" it is1Maria Sophia
28 Mar 26 i `- Re: Apple's macOS full support is a *lot* shorter than most people "think" it is1Norman Dibber
28 Mar 26 `- Re: Apple's macOS full support is a *lot* shorter than most people "think" it is1Martin Τrautmann

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