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A full history of macOS (OS X) release dates and rates

Updated and republished for macOS 10.15.6 Supplemental Update 1; 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 10.15.6 SU1, as of August 12th, 2020—the 137th 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.)

2020 Aug 12 28 10.15.6 SU1 3.22GB GB
Jul 15 44 10.15.6 3.35 GB
Jun 1 6 10.15.5 SU1 1.59 GB
May 26 48 10.15.5 3.37 GB
Apr 8 15 10.15.4 SU1 1.38 GB
Mar 24 56 10.15.4 3.0 GB
Jan 28 49 10.15.3 3.0 GB
2019 Dec 10 42 10.15.2 3.0 GB
Oct 29 14 10.15.1 4.5 GB
Oct 15 8 10.15 SU1 985 MB No info page
Oct 7 11 10.15 4.9 GB Catalina - You need more permission!
Sep 26 31 10.14.6 SU3 1.32 GB
Aug 26 25 10.14.6 SU2 1.25 GB
Aug 1 10 10.14.6 SU1 949 MB
Jul 22 70 10.14.6 2.7 GB
May 13 49 10.14.5 2.5 GB
Mar 25 62 10.14.4 2.8 GB
Jan 22 48 10.14.3 2.0 GB
2018 Dec 5 28 10.14.2 2.5 GB
Nov 7 8 10.14.1 SU1 1.3 GB For 2018 MacBook Air
Oct 30 36 10.14.1 3.3 GB
Sep 24 27 10.14 5.2 GB Mojave - The 'you need permission' release
Aug 28 38 10.13.6 SU2 1.32 GB For 2018 Touch Bar MBP…again
Jul 24 15 10.13.6 SU1 1.31 GB For 2018 Touch Bar MBP
Jul 9 38 10.13.6 1.32 GB AirPlay 2
Jun 1 64 10.13.5 2.12 GB Messages in iCloud
Mar 29 37 10.13.4 2.36 GB Sortable Safari bookmarks!!
Feb 20 28 10.13.3 SU 40.4 MB Indian character/Messages crash fix
Jan 23 33 10.13.3 1.97 GB
Jan 8 33 10.13.2 SU 633.6 MB Spectre and Meltdown fixes
2017 Dec 6 36 10.13.2 2.08 GB
Oct 31 26 10.13.1 1.47 GB
Oct 5 10 10.13 SU 915 MB Addresses two security issues
Sep 25 68 10.13 4.8 GB High Sierra - Higher in the mountains?
Jul 19 65 10.12.6 1.98 GB
May 15 49 10.12.5 1.57 GB
Mar 27 63 10.12.4 1.56 GB Night Shift
Jan 23 41 10.12.3 1.05 GB
2016 Dec 13 50 10.12.2 1.94 GB
Oct 24 34 10.12.1 1.36 GB
Sep 20 64 10.12 4.77 GB Sierra - Still in the mountains.
Jul 18 63 10.11.6 759 MB
May 16 57 10.11.5 759 MB
Mar 20 61 10.11.4 1.58 GB
Jan 19 41 10.11.3 662 MB
2015 Dec 9 49 10.11.2 1.4 GB
Oct 21 21 10.11.1 1.19 GB
Sep 30 48 10.11 6.08 GB El Capitan - Go climb something!
Aug 13 44 10.10.5 1.02 GB
Jun 30 75 10.10.4 1.09 GB
Apr 16 8 10.10.3 SU 1.8 MB Supplemental Update
Apr 8 71 10.10.3 1.52 GB Includes Photos app
Jan 27 71 10.10.2 544 MB
2014 Nov 17 32 10.10.1 311 MB
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 10.8.5 SU 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 10.8.2 SU 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 10.7.5 SU 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 2.31 GB 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 2.15 GB 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 97 MB
Jul 12 57 10.4.2 44 MB
May 16 17 10.4.1 37 MB
Apr 29 14 10.4 1.78 GB 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 36.9 MB
Nov 10 17 10.3.1 1.5 MB
Oct 24 21 10.3 1.54 GB 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 26 MB
Apr 10 56 10.2.5 81.9 MB
Feb 13 56 10.2.4 76 MB
2002 Dec 19 38 10.2.3 51 MB
Nov 11 54 10.2.2 24.4 MB
Sep 18 26 10.2.1 16.3 MB Update not available?
Aug 23 79 10.2 1.03 GB 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 10.1 989 MB Puma
Jun 22 44 10.0.4 12 MB
May 9 1 10.0.3 15 MB
May 8? 22 10.0.2 15 MB Released but replaced (see comments)
Apr 16 23 10.0.1 4 MB
Mar 24 192 10.0 659 MB Cheetah
2000 Sep 13 -- 10.0β 676 MB Public Beta

Note: The Days column reflects the number of days between 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 10.15.6 SU1, there have been 137 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 have been publicly discussed, so I've counted them. If I'm wrong about either of these, please correct me.
  • As of July 15th, 2020 (macOS 10.15.6's release date), it's been 7,273 days since the Public Beta was released. So on average, we've seen some sort of update every 53 days.
  • The shortest time period between any two releases (not counting 10.0.2's one-day release-and-replace) is six days, which is how quickly the 10.15.5 Supplemental Update 1 came out after the 10.15.5 release.
  • The longest time period between any two minor releases is 165 days, which was how long we waited for the 10.4.9 update.
  • The smallest update was 10.3.1, at only 1.5MB. The largest (non-combo, non-main OS release) update was 10.15.1 at 5.3GB.
  • 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

A special "thank you!" goes to Mr. Ziebell (for providing some size values on very-old minor updates), and to Benton Quest (for providing size info on all the major releases up through Snow Leopard). See Benton's comment below if you want a nicely detailed history of those early releases.


Add a Comment
  1. Nice tables! :)

    The interesting question for me is, how many bug fixes/features did each of these releases contain over the previous ones?

  2. 10.2.7 was available only on certain new models shipping late Summer 2003 - Fall 2003. I don't believe it was available as a seperate download.


  3. Ah, that's right -- I think it was for the first-gen G5s. I've changed the note on the table to indicate that...


  4. Your table doesn't have 10.0.4 in it, which i am almost certain existed. I think it came out in late June 2001.

  5. Sorry, that was an editing oversight -- it's in there now, and yea, it was June 22, 2001. It *was* included in all the other analyses, though (total releases, releases by month, etc.). I just missed it putting the table together.


  6. There was at least one re-release (I forget which). It probably isn't even listed on the download section as the first release had some major problems (hence the immediate re-release). And I hate to point it out, but you put " 'to minor' " instead of " 'two minor' " on the third bullet.

  7. Actually, 'to minor' is what I meant to write -- as in if you only count updates that went to minor version numbers, instead of to major version numbers...


  8. I had put together a similar table, but I also had a weighted average of all the time in between releases. The idea being that it might give me some indication for an educated guess on how long it will be before the next release. I had a % accuracy of all my numbers and a projected time span for the next minor release. About numbers, statistics and Excel... I thought I was the only one ;) Recently I started focusing all that energy and effort on stocks (something useful, and something that can make me money!). Keep up all the good work on the Robservatory. I enjoy reading what you have to say.

  9. i was just wondering if anyone could help me, this probably isn't the right place to ask but you all seem pretty smart and i am technologically retarded so, my dilema... i need to upgrade my os x (currrently 10.2.8) but i can't download anything higher than 10.3 if i don't already have 10.3, which i have been looking for frantically but havent been able to find anywhere. does it exist for me to download? is it that my system will not be able to take it anyway? i don't know what to do now but i am quickly slipping into technological redundancy as i need to download things which require a better os. any help would be greatly appreciated. thankyou.

  10. 10.3 is a purchase upgrade from 10.2.8. At this point, your best bet is to just jump to 10.4, also a purchase-only upgrade.

    And for future reference, you'll get much better help from forums such as those at macosxhints ( and Macworld.


  11. Hmm. I said it had 10, and that's still what I get to based on the table above. What am I missing ... or counting twice, as it may be?


  12. Rob,

    Thanks, just the information I needed!
    Are you going to update this now that 10.4.5 and 10.4.6 have been released? If not, do you know anyone else who does? E.g. Juz10Mac pointed out that he made some prognosis stuff, but didn't leave a URL (shame on you, Justin!).

  13. You list 10.0.2 as "never released", but in fact it was. I'm having trouble finding the exact date, but I'm pretty sure it was the 1st of April 2001 (I can find news references to in from April 2nd, backing up that date).

    The reason you're not finding it in the KBase is that, for some unknown reason, Apple all but erased its existance when 10.0.3 (which only makes minor changes from .0.2) shipped; although Software Update would in fact produce an incrimental updater, the 10.0.3 update completely replaced every trace of the 10.0.2 one on Apple's site.

    I remember there being some confusion as to why Apple had done this, and here's an article Google dug up for me that goes into great detail about it:

    10.0.2 was real, though, I'm almost certain I remember installing it, and there were products (initial OSX Cro-mag Rally beta, for example) that required it.

  14. #16: Thanks for the clarification; I updated the comments section to refer to the version as released then replaced.


  15. What I'd like to know is the total elapsed time from when Apple starts a Major release such as 10.5 to when they actually release it for Public retail purchase. I suspect its around 2 or 3 years.

  16. The reason you're seeing more minor releases is the time between the major ones is increasing. If you do the maths the number of minor releases for all versions work out very similar: (ignoring actual release dates) for Puma it worked out to be a minor release every 46 days, for Jaguar 55, for Panther 53, and Tiger 55.

    The release times are: Cheetah to Puma 185 days, to Jaguar 332, to Panther 427, to Tiger 553. As of today, Leopard's at 684...

  17. I don't think that's correct: the iMac was the first Intel Mac, introduced in January of 2006, and it shipped with 10.4.4.

    I don't think any Intel Macs existed before January 2006, and 10.4.3 came out in the fall of 2005.


  18. Actually, 10.5 is the first universal binary. Previous installs of the OS were either PPC or x86 separately. I would call 10.4.4 (10.4.3?) the first public release of an x86 build of the OS.

  19. bdog: Correct you are; I changed the label on 10.4.4 and gave the Universal sticker to 10.5.

    Of course, 10.4.11 coming out after 10.5 messes up the sorted-on-date view of the table, but I think it makes more sense to keep the OS releases togeter. (Hopefully there's not a 10.4.12 coming.)


  20. Rob: I noticed that you noted that 10.5.1 removes the "blue screen Windows sharing icon". I can still find the same icon resource at the same location: /System/Library/CoreServices/CoreTypes.bundle/Contents/Resources/public.generic-pc.icns .

    Or are you saying the resource might be still there, but the Finder doesn't use it when displaying Windows shares anymore? If so, what does it use now?

  21. Hmm, my bad, I think. I was looking at GenericPCIcon.icns, which is a gray version of the Windows diamond logo. The public file is still there. I wonder which will get used (I don't have a PC to connect to).

    For now, I've taken the note out.


  22. Windows PC icon for Network environment window is the same in 10.5.1 as it was in 10.5, i.e. it's a beautifully rendered old-fashioned CRT monitor with BSOD image. It looks especially funny along with great Mac icons, which correspond to real Mac hardware (if it runs Leopard). So, one may judge who's running Leopard on the LAN by their icons amongst others.

  23. Okay, I have crunched numbers in this thread. I have read the bones. I prognosticate uselessly! Feb 09 will bring a release that could be dubbed OS11.

  24. I run a plastic cards company and we use macs for everything. We have top end mac pros and macbook pros running snow leopard and some older machines (I cant bare to get rid of them) G5 power macs and G4 power books that run leopard.

    I find that with snow leopard, apple mail is much nippier than it was on leopard but in general, a 8 core mac pro - feels sluggish.

    I love using macs and will never go back to using pc's but they just don't seem to have any speed about them these days.

    I remember many many years ago when I bought my 1st G4 powerbook, it was great and speed wasn't an issue but now, installed with the most upto date OSX that will run on it, it is rather sluggish to say the least.

  25. I think 10.4.7 was the first universal binary system that came out. Certainly was the first Retail release that could be installed on both. Perhaps I'm thinking the server version…?

    Some more comments next to each release, as well as a link to the Knowledge Base article would be useful additions.

    To Paul Wilburn — get yourself a Solid State Harddrive. This is where the big bottle neck is on anyone's system. Get a small one to try it out and stick your toe in the water. You will not regret it at all.

  26. There were separate releases for Intel and PPC (10.4.3, 10.4.4, 10.4.5, 10.4.6 etc) until 10.4.7 when you could get the Universal installer. Updates after this were listed as Universal for those that had started with a 10.4.7.

  27. Charlie:

    I think you're thinking of Server; Apple's update site still lists Intel and PowerPC as separate downloads for 10.4.7 through 10.4.11. For Server, though, there's only one listed (for any Server release), but I don't see any system requirements, so I can't tell if it's universal or not.


  28. I've now added a link to Apple's Support site (the ⓘ symbol) so you can read what Apple had to say about each release. The only two that are missing are the two non-releases in the list (10.0.2 and 10.2.7).


  29. If you going to go all the way back to the Public Beta, you may wish to add the Rhapsody releases (see ) as well, as that was the first place that I was able to experience what was to become OS X.

  30. you say there was only 1 public beta

    but there were 2

    US version had build number 1H39

    But there was also an international version with build number 2E14

  31. Rob, very useful information! This is a tremendous help for our Tech Support Dept when trying to quickly communicate with our on-campus users.

  32. Hi guys sat here chuckling , all I was looking for was info on what worked with my early imac 2006 , and here's you 2 , slugging it out over updates etc , all I wanna do is make the damm thing work ,ha ha

  33. I have a Mac OS X at 10.6.8 version. And I need to upgrade to the newest. How and where can I get this done pretty quick. I need to replace my HP printer and the newer ones (I was told) are not compatible with my OS that I currently have. Thank you so much.

  34. Thank you! I did not find this useless, I found it very helpful. Managing resources at a university with a myriad of versions everywhere, it gets confusing and this is helpful just to sort out what is compatible with what!

  35. I also didn't find this useless. I've just set up a caching server and wanted to know when and how big the next release might be. thanks!

  36. Very useful actually! With the release of Sierra and the disappearance of El Capitan in the APP Store, the older MBPs are being put out to pasture. El Capitan 10.11 original download now says "corrupt when try to install." Thanks to this page, I was able to just manually reset the MBP date to the release date of September 30, 2015 for the app and off she went! Thanks!

  37. "The smallest update was 10.3.1, at only 1.5MB. The largest (non-combo) update was 10.12.2 at 1.94GB. (No idea why this one was so large.)"

    You have 10.12.6 listed as 1.98GB, so that's the new king of that hill. What will be the first update to pass 2 GB? Probably when we get 8K iMacs?

    1. You realize I created those graphs too, right? I'm planning on keeping them updated, but not as part of this post, as I see them as distinct. But what type of graphs were you thinking of, if not the two that are already here or the rate of update charts?


  38. Thanks for the clear list of the versioning of OS X. I'm currently helping to clean up an estate, which included a bunch of old Mac stuff where drives need to be formatted etc before systems are sold or donated.

    I'm coming to the whole OS X world cold, and I have not found a list that shows which upgrades were free, and which ones were paid upgrades. Could this be another column?

    1. I don't think it's worth another column -- historically, anything other than a dot update was paid, all dot updates are free. But since I'm not quite sure when, even the major updates have been free.


  39. What about the macOS High Sierra 10.13.6 Supplemental Update for MacBook Pro ?
    Shouldn't it be listed here, too?

  40. Hi, I think that "as of July 9th, 2018" is not correct… :)
    (fell free to delete this comment after the correction)

    1. Thanks, fixed! And not deleting your comment, as I try not to hide from my occasional stupidity :).


    1. You do realize that I maintain my blog in my spare time, make no money from it, and it's a hobby, right? That means there are times when updates won't be timely because Real Life is intruding. Yesterday was such a case.


      1. Thanks for you wonderful time spent on such a great hobby! I really appreciate the details in time, when you do get too it. Always a fan of the Blog and your funny stuff too!! Please when you can keep us honest! Really many Thank you-s, Bear

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