macOS Big Sur 11.2.1 Update (20D74) is Live! What’s New?

MrMacintosh.com - macOS Big Sur 11.2.1 Update — macOS Big Sur 11.2.1 Update

The macOS Big Sur 11.2.1 (20D74) update is now available for all users!

UPDATE 2/15/21 – Apple has released a new macOS Big Sur 11.2.1 (20D75) Full Installer to address the Big Sur Upgrade not enough free space check issue! – https://mrmacintosh.com/big-sur-upgrade-not-enough-hd-space-serious-issue-possible-data-loss/

macOS Big Sur 11.2.1 (20D75) Full Installer – http://swcdn.apple.com/content/downloads/00/60/071-05432-A_QOY2QE0UMR/puuz6c0epc7o0ozyovvi6tjxhzpf6uf04s/InstallAssistant.pkg

Sudo sudo sudo sudo sudo! I’ve sent out more than a few tweets about the CVE-2021-3156 Heap-Based Buffer Overflow in Sudo. I was trying to find out if macOS was vulnerable and if Apple would release a fix.

Today Apple released that fix it’s included in the following macOS Updates

1. macOS Big Sur 11.2.1 Update
2. macOS Catalina 10.15.7 Supplemental Update
3. macOS Mojave 2021-002 Security Update

2016-2017 15″ MacBook Pro Battery Problems + Replacement Program

This update also addresses a battery issue in 2016 & 2017 MacBook Pro Laptops. Update addresses an issue that may prevent the battery from charging in some 2016 and 2017 MacBook Pro models.

Apple has just released an article that goes over this issue and how you can get your 2016-2017 MacBook Pro battery replaced if it’s having this issue.

https://support.apple.com/en-us/HT212163

Click “Continue Reading” for the rest of the article.

CVE-2021-3156 Heap-Based Buffer Overflow in Sudo

For more info in this vunerablity check out this link > https://blog.qualys.com/vulnerabilities-research/2021/01/26/cve-2021-3156-heap-based-buffer-overflow-in-sudo-baron-samedit

From Apple:

Sudo Available for: macOS Big Sur 11.2, macOS Catalina 10.15.7, macOS Mojave 10.14.6 Impact: A local attacker may be able to elevate their privileges Description: This issue was addressed by updating to sudo version 1.9.5p2. CVE-2021-3156: Qualys
https://support.apple.com/en-us/HT212177

In macOS Big Sur 11.2 the version of sudo is 1.8.31

sudo -V
Sudo version 1.8.31
Sudoers policy plugin version 1.8.31
Sudoers file grammar version 46
Sudoers I/O plugin version 1.8.31

Running a quick test with a link to sudoedit, this is the output with 1.8.31

env -i 'AA=a\' 'B=b\' 'C=c\' 'D=d\' 'E=e\' 'F=f' ./sudoedit -s '1234567890123456789012\'
sudoedit(1318,0x10276bd40) malloc: Incorrect checksum for freed object 0x147e08e98: probably modified after being freed.
Corrupt value: 0x663d4600653d45
sudoedit(1318,0x10276bd40) malloc: *** set a breakpoint in malloc_error_break to debug
zsh: abort      env -i 'AA=a\' 'B=b\' 'C=c\' 'D=d\' 'E=e\' 'F=f' ./sudoedit -s

After updating to macOS Big Sur 11.2.1, the version of sudo is now 1.9.5p2

sudo -V
Sudo version 1.9.5p2
Sudoers policy plugin version 1.9.5p2
Sudoers file grammar version 48
Sudoers I/O plugin version 1.9.5p2
Sudoers audit plugin version 1.9.5p2

Running the same test code on 11.2.1 with sudo version 1.9.5p2

env -i 'AA=a\' 'B=b\' 'C=c\' 'D=d\' 'E=e\' 'F=f' ./sudoedit -s '1234567890123456789012\'
usage: sudoedit [-AknS] [-C num] [-D directory] [-g group] [-h host] [-p
                prompt] [-R directory] [-T timeout] [-u user] file ...

macOS Big Sur 11.2.1 Patch Notes Summary

0 – New Features
2 – Resolved Issues
0 – Enterprise Changes

Apple Links

AppleSeed Notes Link = appleseed.apple.com/

Developer Public Link = developer.apple.com/documentation/macos-release-notes

Direct Link to macOS Big Sur 11.2 Patch Notes –https://developer.apple.com/documentation/macos-release-notes/macos-big-sur-11_2-release-notes

macOS Deployment References Changes – https://support.apple.com/guide/deployment-reference-macos/document-revision-history-apd04dff7069/web

Articles of interest for Apple Silicon & macOS Big Sur

How to reinstall macOS on your Apple Silicon M1 Mac

mrmacintosh.com/how-to-reinstall-macos-on-your-apple-silicon-mac-everything-you-need-to-know/

How to reinstall macOS with Apple Configurator 2 and IPSW Files.

mrmacintosh.com/restore-macos-firmware-on-an-apple-silicon-mac-boot-to-dfu-mode/

Apple Silicon IPSW macOS Big Sur Database

mrmacintosh.com/apple-silicon-m1-full-macos-restore-ipsw-firmware-files-database/

Previous Big Sur 11 Beta and Final Releases

26. macOS Big Sur 11.2.1 (20D74) Current Release
25. macOS Big Sur 11.2 (20D64) – 02/01/21 – My Release Notes
24. Big Sur 11.2 RC 3 (20D64) – 01/28/21 – Not Available
23. Big Sur 11.2 RC 2 (20D62) – 01/25/21 – Not Available
22. Big Sur 11.2 RC (20D53) – 01/21/21 – Not Available
21. Big Sur 11.2 Beta 2 (20D5042d) – 01/13/21 – Not Available
20. Big Sur 11.2 Beta 1 (20D5029f) – 12/16/20 – Not Available
19. Big Sur 11.1 Final (20C69) – 12/14/20 – Current Release
18. Big Sur 11.1 RC (20C69) – 12/10/20 – My Release Notes
17. Big Sur 11.1 Beta 2 (20C5061b) – 12/03/20 – My Release Notes
16. Big Sur 11.1 Beta 1 (20C5048k) – 11/17/20 – Not Available
15. Big Sur 11.0.1 Final (20B50) – 11/19/20 – My Release Notes
14. Big Sur 11.1 Beta (20C5048k) – 11/17/20 – My Release Notes
13. Big Sur 11.0.1 Final (20B29) – 11/12/20 – My Release Notes
12. Big Sur 11 Beta 11.0.1 (20B5022a) Beta 2 RC – 11/05/20 My Release Notes
11. Big Sur 11 Beta 11.0.1 (20B5012d) Beta 1 – 10/28/20 – My Release Notes
10. Big Sur 11 Beta 10 (20A5395g) – 10/14/20 – My Release Notes
9. Big Sur 11 Beta 9 (20A5384c) – 09/29/20 – My Release Notes
8. Big Sur 11 Beta 8 (20A5374i) – 09/22/20 – My Release Notes
7. Big Sur 11 Beta 7 (20A5374g) – 09/17/20 – My Release Notes
6. Big Sur 11 Beta 6 (20A5364e) – 09/03/20 – My Release Notes
5. Big Sur 11 Beta 5 (20A5354i) – 08/19/20 – My Release Notes
4. Big Sur 11 Beta 4 (20A5343i) – 08/04/20 – Not Available
3. Big Sur 11 Beta 3 (20A5323l) – 07/22/20 – Not Available
2. Big Sur 11 Beta 2 (20A4300b) – 07/07/20 – My Release Notes
1. Big Sur 11 Beta 1 (20A4299v) – 06/22/20 – My Release Notes

macOS Big Sur 11 Installer Info

Note: Starting with macOS Big Sur, Combo and Delta update pkg’s aka packages are not available as standalone downloads.

More Info – eclecticlight.co/2020/12/17/apple-has-stopped-providing-standalone-installers-for-macos-updates/

Full Installer.app

A Full Installer of MacOS Big Sur 11.2.1 is not available yet.

Link – macOS Big Sur Mac App Store

Size = Waiting

Product ID = Waiting

Requirements – macOS Big Sur 11.2.1 Requirements

macOS Big Sur 11.2.1 full Installer via InstallAssistant.pkg

Installing this package will put the full “Install macOS Big Sur.app” in your applications folder.

http://swcdn.apple.com/content/downloads/00/60/071-05432-A_QOY2QE0UMR/puuz6c0epc7o0ozyovvi6tjxhzpf6uf04s/InstallAssistant.pkg

Big Sur Delta Update

This is the update is for updating from 11.2 > 11.2.1

Size = 3.35GB

Big Sur Combo Update

This is update should be for updating from 11.0 > 11.2.1

Size = Unknown

Apple Silicon Firmware Update

This update has a new firmware update.

Apple Silicon M1 Firmware Update = NOT UPDATED! 6723.81.1

Previous Firmware Updates

9. Big Sur 11.2.1 Final = 6723.81.1
8. Big Sur 11.2 Final = 6723.81.1
7. Big Sur 11.2 RC 2 = 6723.81.1
6. Big Sur 11.2 Beta 2 = 6723.80.17
5. Big Sur 11.1 Final – 6723.61.3
4. Big Sur 11.1 Beta 2 – 6723.61.3
3. Big Sur 11.1 Beta 1 -6723.60.62
2. Big Sur 11.0.1 – 6723.50.2
1. Big Sur 11.0 – 6723.41.11

T2 BridgeOS Update

The Version of BridgeOS for your T2 Security Chip (2018-2020 Intel Macs) was updated.

BridgeOS version = NOT UPDATED – 18.16.14346.0.0

Size = 439.4

14. 11.2.1 Prod = 18.16.14346.0.0
13. Previous 11.2 Prod = 18.16.14346.0.0
12. Previous 11.1 Prod = 18.16.13030.0.0 Build Version 11
11. Previous 11.1 RC = 18.16.13030.0.0
10. Previous 11.1 Beta 2 = 18.16.13026.5.2
9. Previous 11.1 Beta = 18.16.13017.5.3
8. Previous Beta RC2 = 18.16.12560.5.1
7. Previous Beta 11 = 18.15.12551
6. Previous Beta 10 = 18.16.12402.5.2
5. Previous Beta 9 = 18.16.12390.5.1
4. Previous Beta 8 = 18.16.12380 BuildVersion 3
3. Previous Beta 7 = 18.16.12380
2. Previous Beta 6 = 18.16.12370.5.1
1. Previous Beta 5 = 18.16.10358.5.2

Apple Silicon IPSW Restore file Update

Apple has released the full IPSW restore file for Apple Silicon Macs. I keep track of all of them in my Apple Silicon Firmware Database

https://mrmacintosh.com/apple-silicon-m1-full-macos-restore-ipsw-firmware-files-database/

1. macOS Big Sur 11.2.1 = UniversalMac_11.2.1_20D74_Restore.ipsw
3. macOS Big Sur 11.2 = UniversalMac_11.2_20D64_Restore.ipsw
3. macOS Big Sur 11.1 = UniversalMac_11.1_20C69_Restore.ipsw
4. macOS Big Sur 11.0.1 = UniversalMac_11.0.1_20B29_Restore.ipsw

Security Content of macOS Big Sur 11.2.1

Security fixes included in the 11.2.1 Update

https://support.apple.com/en-d/HT212177

macOS Big Sur 11.2.1 (20D74) Release Notes

Overview

macOS Big Sur 11.2.1 Update — Restart Required

Update addresses an issue that may prevent the battery from charging in some 2016 and 2017 MacBook Pro models.

Big Sur 11.2.1 Update

Liked it? Take a second to support Mr. Macintosh on Patreon!

12 thoughts on “macOS Big Sur 11.2.1 Update (20D74) is Live! What’s New?”

Martin Ecker says:

February 20, 2021 at 5:51 pm

http://swcdn.apple.com/content/downloads/18/45/071-07137-A_2FUWV3QSE1/4qawia576il8485zhiuri615k19rjlcn2d/InstallAssistant.pkg

And this is the direct link to the full installer: InstallAssistant.pkg (20D74)
Martin Ecker says:

February 17, 2021 at 1:09 pm

http://swcdn.apple.com/content/downloads/00/60/071-05432-A_QOY2QE0UMR/puuz6c0epc7o0ozyovvi6tjxhzpf6uf04s/InstallAssistant.pkg

This is the direkt link to the InstallAssistant.pkg (11.2.1)
sue says:

February 17, 2021 at 11:54 am

Problems reported with TurboTax not compatible with Mac OS Big Sur 11.2.1. I have an Air. Has this been fixed? Is it up to Apple or is it up to Turbo Tax to fix?
Andre van der Lans says:

February 13, 2021 at 10:55 pm

I have installed 11.1 on map mid 2012 with the help of Mr Macintosh and it works well.
Now I would like to install 11.2.1 and I would need again a patcher of mr Macintosh.
Question: is there a patcher available for the latest update?
If it exist, where can I find it? And can it be installed on the MBP mid 2012?
tom says:

February 11, 2021 at 3:52 am

Did you experience any issues on a MacPro5,1 and Mojave?
1. tom says:
  
  February 17, 2021 at 5:30 am
  
  So far, I have not experienced any issues on a MacPro 5,1 and macOS Mojave Security Update 2021-002.
josehill says:

February 10, 2021 at 11:26 am

Maybe not for all users. If you’re running Big Sur as a guest in a VMware Fusion 11.5.7 virtual machine, updates haven’t been showing up in the Software Update preference pane.

I had to download the full 11.2 installer from the App Store to go from 11.1 to 11.2, and there is no directly downloadable 11.2.1 updater yet, so I’m out of luck.
Jon says:

February 10, 2021 at 4:14 am

Does anyone know if 11.2 is safe for older machines (ie Macbook late 2013 – 189A3D4F975D5FFC)?
1. Mr. Macintosh says:
  
  February 10, 2021 at 10:39 am
  
  YES! Apple fixed this issue in 11.1
The Cocoa says:

February 9, 2021 at 10:54 pm

CVE-2021-3156 Heap-Based Buffer Overflow in Sudo is not fixed in 11.3 beta:

sw_vers>
ProductName: macOS
ProductVersion: 11.3
BuildVersion: 20E5172i

sudo -V>
Sudo version 1.8.31
Sudoers policy plugin version 1.8.31
Sudoers file grammar version 46
Sudoers I/O plugin version 1.8.31
Pingback: Michael Tsai - Blog - macOS 11.2.1
Pingback: Apple Releases Big Sur 11.2.1 – 512 Pixels

Comments are closed.