The Robservatory

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A useless analysis of macOS (OS X) release dates

Updated and republished for macOS 10.13.6; skip it unless you really really care about all the macOS releases. Originally published on November 14th, 2005.

Below the break is a table showing all major releases of macOS (previously Mac OS X) from the public beta through the latest public version, which is macOS 10.13.6, as of July 9th, 2018—the 113th release in total.

Note: Click the ⓘ symbol to read Apple’s release notes for a given update.

The following was culled from Apple’s support downloads page, and as such, some of the dates may be off just a bit. If you know for certain that something is incorrect, please let me know and I’ll get it fixed. (Scroll to see all entries.)

Year Month
Day
Gap
(days)
Version Size Comments
2018 Jul 9 38 10.13.6 1.32GB AirPlay 2
Jun 1 64 10.13.5 2.12GB Messages in iCloud
Mar 29 37 10.13.4 2.36GB Sortable Safari bookmarks!!
Feb 20 28 10.13.3SU 40.4MB Indian character/Messages crash fix
Jan 23 33 10.13.3 1.97GB
Jan 8 33 10.13.2SU 633.6MB Spectre and Meltdown fixes
2017 Dec 6 36 10.13.2 2.08GB
Oct 31 26 10.13.1 1.47GB
Oct 5 10 10.13SU 915MB Addresses two security issues
Sep 25 68 10.13 4.8GB High Sierra – Higher in the mountains?
Jul 19 65 10.12.6 1.98GB
May 15 49 10.12.5 1.57GB
Mar 27 63 10.12.4 1.56GB Night Shift
Jan 23 41 10.12.3 1.05GB
2016 Dec 13 50 10.12.2 1.94GB
Oct 24 34 10.12.1 1.36GB
Sep 20 64 10.12 4.77GB Sierra – Still in the mountains.
Jul 18 63 10.11.6 759MB
May 16 57 10.11.5 759MB
Mar 20 61 10.11.4 1.58GB
Jan 19 41 10.11.3 662MB
2015 Dec 9 49 10.11.2 1.4GB
Oct 21 21 10.11.1 1.19GB
Sep 30 48 10.11 6.08GB El Capitan – Go climb something!
Aug 13 44 10.10.5 1.02GB
Jun 30 75 10.10.4 1.09GB
Apr 16 8 10.10.3SU 1.8MB Supplemental Update
Apr 8 71 10.10.3 1.52GB Includes Photos app
Jan 27 71 10.10.2 544MB
2014 Nov 17 32 10.10.1 311MB
Oct 16 29 10.10 5.2 GB Yosemite – No surfers here.
Sep 17 79 10.9.5 139 MB
Jun 30 46 10.9.4 283 MB
May 15 79 10.9.3 461 MB
Feb 25 71 10.9.2 460 MB
2013 Dec 16 55 10.9.1 243.4 MB
Oct 22 19 10.9 5.3 GB Mavericks – All out of big cats!
Oct 3 21 10.8.5SU 19.6 MB Supplemental Update
Sep 12 100 10.8.5 273.7 MB
Jun 4 82 10.8.4 152.0 MB
Mar 14 161 10.8.3 249.0 MB
2012 Oct 4 15 10.8.2SU 26.7 MB Supplemental Update
Sep 19 27 10.8.2 665.5 MB
Aug 23 29 10.8.1 24.2 MB
Jul 25 77 10.8 4.1 GB Mountain Lion – App Store only
Oct 4 15 10.7.5SU 2.0 MB Supplemental Update
Sep 19 133 10.7.5 1.1 GB Released w/ 10.8.2
May 9 98 10.7.4 692.7 MB
Feb 1 112 10.7.3 1.3 GB Only combo updater available
2011 Oct 12 56 10.7.2 768.8 MB Now iCloud enabled
Aug 17 29 10.7.1 79.3 MB
Jul 19 26 10.7 4.1 GB Lion – App Store only (USB stick later)
Jun 23 94 10.6.8 453.6 MB App Store readied for Lion
Mar 21 74 10.6.7 475 MB
Jan 6 57 10.6.6 143.6 MB Can you say “App Store?”
2010 Nov 10 148 10.6.5 644.5 MB
Jun 15 78 10.6.4 607.2 MB
Mar 29 140 10.6.3 719.2 MB
2009 Nov 9 60 10.6.2 473 MB
Sep 10 13 10.6.1 71.5 MB
Aug 28 23 10.6 ??? Snow Leopard – First Intel-only release
Aug 5 85 10.5.8 274 MB
May 12 148 10.5.7 442 MB
2008 Dec 15 91 10.5.6 372 MB
Sep 15 77 10.5.5 316 MB
Jun 30 33 10.5.4 88 MB
May 28 107 10.5.3 420 MB
Feb 11 88 10.5.2 343 MB Combo updater only
2007 Nov 15 20 10.5.1 110 MB
Oct 26 128 10.5 ??? Leopard – First universal binary release
Nov 14 147 10.4.11 128 MB This ’10’ goes to ’11’
Jun 20 99 10.4.10 72 MB
Mar 13 165 10.4.9 160 MB
2006 Sep 29 94 10.4.8 206 MB
Jun 27 85 10.4.7 133 MB
Apr 3 48 10.4.6 163 MB
Feb 14 35 10.4.5 16 MB
Jan 10 71 10.4.4 55 MB First Intel-capable release
2005 Oct 31 111 10.4.3 97MB
Jul 12 57 10.4.2 44 MB
May 16 17 10.4.1 37 MB
Apr 29 14 10.4 ??? Tiger
Apr 15 65 10.3.9 51.3 MB
Feb 9 56 10.3.8 26.6 MB
2004 Dec 15 40 10.3.7 97 MB Combo updater only
Nov 5 88 10.3.6 34 MB
Aug 9 75 10.3.5 ???
May 26 72 10.3.4 79 MB Combo updater only
Mar 15 89 10.3.3 70 MB Combo updater only
2003 Dec 17 37 10.3.2 36.9MB
Nov 10 17 10.3.1 1.5 MB
Oct 24 21 10.3 ??? Panther
Oct 3 57 10.2.8 40 MB
Aug 7? 93 10.2.7 ??? For first-gen G5s only
May 6 26 10.2.6 26MB
Apr 10 56 10.2.5 81.9 MB
Feb 13 56 10.2.4 76 MB
2002 Dec 19 38 10.2.3 51MB
Nov 11 54 10.2.2 24.4MB
Sep 18 26 10.2.1 16.3MB Update not available?
Aug 23 79 10.2 ??? Jaguar
Jun 5 47 10.1.5 45.1 MB Combo updater only
Apr 19 57 10.1.4 1.7 MB
Feb 21 62 10.1.3 16 MB
2001 Dec 21 37 10.1.2 29.2 MB
Nov 14 50 10.1.1 13.8 MB
Sep 25 95 10.1 ??? Puma
Jun 22 44 10.0.4 12 MB
May 9 1 10.0.3 15 MB
May 8? 22 10.0.2 15MB Released but replaced (see comments)
Apr 16 23 10.0.1 4MB
Mar 24 192 10.0 ??? Cheetah
2000 Sep 13 10.0β ??? Public Beta

Note: The Gap column reflects the number of days between update releases. Some entries may appear out of chronological order (i.e. 10.5 is shown on Oct 26, but above Nov 14 for 10.4.11). This is to keep the version numbers in the proper order, even when an older OS received an update after a major new release came out. This has happened a few times over the years.

Some random notes, updated from the original post:

  • Starting with the Public Beta and up through macOS 10.13.6, there have been 113 macOS releases, both major and minor. This figure includes every macOS release. There have been two updates—10.0.2, which as far as I can tell, was never released, and 10.2.7, which I believe was the update with the one-day lifespan—that are somewhat odd, but they publicly discussed, so I’ve counted them. If I’m wrong about some of these, please correct me.
  • As of July 9th, 2018 (macOS 10.13.6’s release date), it’s been 6,508 days since the Public Beta was released. So on average, we’ve seen some sort of update every 57.6 days.
  • The shortest time period between any two releases is 8 days, which is how quickly the 10.10.3 Supplemental Update came out after the 10.10.3 release.
  • The longest time period between any two minor releases is 165 days, which was how long we waited for the 10.4.8 » 10.4.9 update.
  • The smallest update was 10.3.1, at only 1.5MB. The largest (non-combo) update was 10.13.4 at 2.36GB.
  • The “???” entry for Size on a given release indicates I was unable to find the size. Feel free to contact me if you can help replace any of the “???” entries.

And now, gratuitous graphics…

Releases by version number

Releases by year

I warned you it was useless…perhaps not completely boring, but useless! (Thanks to Mr. Ziebell for providing some size values on very-old minor updates!)

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