Apple Seeds Second OS X 10.11.3 El Capitan Beta to Developers and Public Beta Testers - MacRumors
Skip to Content

Apple Seeds Second OS X 10.11.3 El Capitan Beta to Developers and Public Beta Testers

by

Apple today seeded the second beta of an upcoming OS X 10.11.3 El Capitan update to developers and public beta testers for testing purposes, three weeks after seeding the first OS X 10.11.3 beta and a month after releasing OS X 10.11.2.

The second OS X 10.11.3 beta, build 15D13b, can be downloaded through the Apple Developer Center or via the Software Update Mechanism in the Mac App Store for those who installed the first beta.

os_x_el_capitan_roundup
The first beta of OS X 10.11.3 did not include any noticeable outward-facing changes, suggesting the update will focus on security enhancements, performance improvements, and bug fixes to address issues that have been discovered since the release of OS X 10.11.2. Prior OS X El Capitan updates have also focused mainly on under-the-hood improvements.

We'll update this post with any changes that are discovered in the beta.

Tag: OS X 10.11.3
Related Forum: OS X El Capitan

Popular Stories

Apple Event Logo

Apple's Next Era Begins September 1

Thursday May 7, 2026 10:36 am PDT by
Apple recently announced that Tim Cook will be stepping down as CEO later this year, after 15 years of leading the company. Effective September 1, Apple's hardware engineering chief John Ternus will become the company's next CEO, while Cook will become executive chairman of Apple's board of directors. In his new role, Apple said Cook will assist with "certain aspects" of the company,...
Read Full Article
Instagram Feature 2

PSA: Instagram Encrypted Messaging Ends on Friday, May 8

Tuesday May 5, 2026 8:24 am PDT by
Instagram will remove end-to-end encryption for direct messages between users from May 8, 2026. When the date comes around, Meta will potentially be able to see the contents of all messages between users on the social media platform. Encrypting messages has been an optional feature in Instagram since 2023, but in March of this year the social media platform quietly updated a help page to say ...
Read Full Article • 54 comments
Apple Event Logo

Apple Just Released a New Accessory

Monday May 4, 2026 8:13 am PDT by
Apple today released a new Pride Edition Sport Loop for the Apple Watch. The band features a rainbow design with 11 colors of woven nylon yarns. The new Pride Edition Sport Loop is available to order now on Apple.com and in the Apple Store app in 40mm, 42mm, and 46mm sizes, and it will be available at Apple Store locations starting later this week. In the U.S., the band costs $49. There...
Read Full Article

Top Rated Comments

Chase R Avatar
Chase R
135 months ago
Running strong on my original 2008 aluminum MacBook. This thing just won't die.
Score: 7 Votes (Like | Disagree)
Max(IT) Avatar
Max(IT)
135 months ago
Running strong on my original 2008 aluminum MacBook. This thing just won't die.
Great series, especially with an SSD and 8 Gb of ram installed

I never see the loading bar in the indexing box, but that's the least of my worries. Apple ignored my reports about MAIL corruption, Bluetooth crashes that required shutting the machine down. So what did Apple do in response to my constant complaints. My Apple ID no longer works correctly. Sure, I file reports but they fall on deaf ears. No response. AND, publicly as announced here, they renounced any support for Mac models including mine that are in the system list for Macs certified to run El Capitan! If that's not lame I don't know what is.
It looks like I'm going to have to do another complete reinstall again from Mavericks.

THANK YOU MAVERICKS! Without lowly Mavericks, I would have probably lost THOUSANDS of important emails.

This update has solved nothing about my Mac not be certified with my Apple ID either nor does it fix any mail problems.

Looks like I'll start from scratch all over again. Apple has really let Mac OS go. It's sad really. And worse yet, they don't seem to care. :-(
If your mails are so valuable then I strongly suggest you not to use betas....
Score: 3 Votes (Like | Disagree)
jasnw Avatar
jasnw
135 months ago
I've not run into any of those issues. But that means nothing, as every machine is different.
And this is exactly what's so sad about Apple's inability to put out OS's that "just work" any more. As much as I dislike Windows, both Windows and Linux run on a far wider range of hardware than OS X and they don't seem to have the problems Apple has on its much narrower (and tightly controlled) range of hardware with simple things like mail, USB, and network connections (all of which use long-standing international standards in their hardware and software interfaces).
[doublepost=1452186310][/doublepost]I see a lot of "I hope they fixed X" in this thread and very little actual information about things that have or have not been fixed. Any actual experience with this beta release other than how long it took to download? Or maybe the lack of input from people running this beta is due to the fact that the new beta has broken the ability to connect to the Internet??? Just saying ...
Score: 2 Votes (Like | Disagree)
E
Ebenezum
135 months ago
This to me means that the changes are just too embarrassing to list.
I had the same thought but I try to be more optimistic (which is very hard given the number of bugs in 10.11.2).

Probably it's a placebo update, will be released for the sake of releasing but not fixing any longstanding issues...
I'm afraid that is going to happen. At this rate I'm fairly certain it will take at least 10.11.4 or .5 before Apple fixes Time Machine failure to restore files that I reported during beta testing... :mad:

I just hope some good changes are made for disk utility
One can hope but I'm fairly certain hell will freeze over before that happens... :(

THANK YOU MAVERICKS! Without lowly Mavericks, I would have probably lost THOUSANDS of important emails.

This update has solved nothing about my Mac not be certified with my Apple ID either nor does it fix any mail problems.

Looks like I'll start from scratch all over again. Apple has really let Mac OS go. It's sad really. And worse yet, they don't seem to care. :-(
I had a similar situation and I didn't lost any emails because I tested 10.11 on external drive and stopped using it moment I noticed the Mail problem.

I'm going to stay in Mavericks for the foreseeable future because 10.10 and 10.11 have no benefits for me and both contain too many bugs and baffling design decisions.

It seems certain Apple no longer cares about OS X. :mad:
Score: 2 Votes (Like | Disagree)
jonnysods Avatar
jonnysods
135 months ago
Please reduce the beach balls and apps that don't seem to load. Messages just bounces in the dock until I force quit and reload, even after a fresh install.

I miss Yosemite.
Score: 2 Votes (Like | Disagree)
HiRez Avatar
HiRez
135 months ago
For the love of all that is good an holy, please stop the beach balls!!

I get beach balls everywhere with El Capitan on 2011 MacBook Air, 2012 MacBook Pro, 2013 Mac Pro (8 core, 64 GB RAM, D500), 2015 Retina iMac. All with SSD, no hard disks. With Yosemite I rarely experienced beach balls. It's frustrating.
Score: 2 Votes (Like | Disagree)
Read All Comments