macOS 11.7.8 Update


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Nov 17, 2009
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Today Apple released macOS 11.7.8 Update, a major software update to macOS Big Sur. Update any supported system using the built-in Software Update functionality through the macOS System Preferences pane.

What we know about the 11.7.8 Update so far...
  • macOS Build 20G1351
  • Install macOS Big Sur App has been updated - If you downloaded macOS Big Sur from the App Store prior to today, and you want to have the latest version on your backup installer USB, simply log into the Mac App Store and click Download. The updated Install macOS Big Sur App can be found in the Applications folder.
macOS Big Sur 11.7.8 — Restart Required

This update provides important security fixes and is recommended for all users.

For information on the security content of Apple software updates, please visit this website:

Testing is now underway- this post will be updated. Good luck, and let us know how it goes! Report your results here.

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macOS 11.7.2 Update
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macOS 11.6.5 Update
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macOS 11.6 Update
macOS 11.5.2 Update
macOS 11.5.1 Update
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macOS 11.4 Update
macOS 11.3.1 Update
macOS 11.3 Update
macOS 11.2.3 Update
macOS 11.2.2 Update
macOS 11.2.1 Update
macOS 11.2 Update
macOS 11.1 Update
macOS 11.0 Big Sur is Now Available on the Mac App Store
Update Directly to macOS Big Sur
How to Create a macOS Big Sur Public Beta Installation USB
How to Prepare for Big Sur
macOS Big Sur Does NOT Boot with iMac14,2 System Definition
tonymacx86 Clover Theme (Updated for Big Sur)
Introducing the macOS Big Sur Critter!
Big Sur Desktop Support
Big Sur Desktop Guides
Big Sur Laptop Support
Big Sur Laptop Guides
Apple Announces "3rd Transition" for macOS: From Intel CPUs to Apple Silicon
macOS Big Sur Public Beta is Now Available
Apple Previews macOS 11.0 Big Sur - Available Fall 2020
Please post help requests in the Big Sur Desktop Support Forum section (not in this thread).

Pre Update Notes
- This update may break some of your Big Sur functions. Make sure you backup first. :thumbup:

Note: Before you update, make sure your USB ports are properly mapped. I recommend you use this procedure:

Here's the step by step way to update OC:
- Make sure you use the latest versions of the Lilu.kext, AppleALC.kext and WhateverGreen.kext.

Backup your current installation using Carbon Copy Cloner or SuperDuper;

Update to the latest Clover or OpenCore 0.9.1 or newer.
See the tonymacx86 Clover Builds (in Download menu) to update Clover. To update your OpenCore, see this guide. To convert from Clover to Open Core, see this guide.
:ch: Download OCAuxiliaryTools (OCAT):
:ch: Follow the OCAT Guide:
:ch: After completing the Update, reboot.
:ch: Upon reaching the Desktop, open the Terminal and execute:
nvram 4D1FDA02-38C7-4A6A-9CC6-4BCCA8B30102:opencore-version
Confirm you have updated OC to 0.9.1 or newer.

Download the Big Sur 11.7.8. Update from Apple's Mac App Store using System Preferences > Software Update, and run it - the updater will reboot upon completion.
Note: Update will reboot three times; each time Clover/OpenCore picks the correct boot partition. So, sit back and relax. The update takes 3 reboots and ~30 minutes to complete.​

Done! So far, another easy update!

Please post help requests in the Big Sur Desktop Support Forum section (not in this thread).
Hi all,

This update was a short one ... :)
Still prepared for the post-Sonoma OS ...


straightforward, 3 reboots.
Easy but my Addonic PCIe mSata drives/card still drops out after 5-10mins or shortly after sustained use like Speed Disk Test. Time to move to Monterey...don't need the latest just stable. OC 0.7.8 but the same issue persist on latest OC 0.9.3.
Screen Shot 2023-06-24 at 11.48.57 am.png
Works fine Haswell
HD 4400

Screen Shot 2023-06-26 at 8.44.35 PM.png
just updated to version 11.7.8 on my RyzenPRO 5900X desktop machine.
Update process lasted in about 25 minutes, including the download time, with usual three reboots.

OC version is 0.9.2.

Cloned System/Data disk through SuperDuper! as personal disaster recovery procedure.

Screen Shot 2023-06-30 at 21.58.13.png
Please post your question(s) as a standalone thread in the Big Sur Desktop Support forum section. Violators will have their post removed.