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macOS 10.15.4 Supplemental Update

tonymacx86

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Today Apple released macOS 10.15.4 Supplemental Update, a major software update to macOS Catalina. Update any supported system using the built-in Software Update functionality through the System Preferences pane or by using the standalone installer available from Apple.com.

Download the macOS 10.15.4 Supplemental Update

Screen Shot 2020-04-09 at 9.05.14 AM.png
What we know about the 10.15.4 Supplemental Update so far...
  • macOS Build 19E287
  • Install macOS Catalina App has been updated - If you downloaded macOS Catalina 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 Catalina App can be found in the Applications folder.
  • This update has been rolled into the standard 10.15.4 Update and Combo Update.
macOS Catalina 10.15.4 supplemental update improves the stability and security of your Mac.
  • Fixes an issue where Mac computers running macOS Catalina 10.15.4 could not participate in FaceTime calls with devices running iOS 9.3.6 and earlier or OS X El Capitan 10.11.6 and earlier
  • Resolves an issue where you may repeatedly receive a password prompt for an Office 365 account
  • Fixes an issue where MacBook Air (Retina, 13-inch, 2020) may hang in Setup Assistant or when disconnecting and reconnecting a 4K or 5K external display
  • Resolves an issue where a USB-C port in your Mac may become unresponsive.
Some features may not be available for all regions, or on all Apple devices. For detailed information about the security content of this update, please visit: https://support.apple.com/kb/HT201222

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

Related:
macOS 10.15.4 Update
macOS 10.15.3 Update
macOS 10.15.2 Update
macOS 10.15.1 Update
macOS 10.15.0 Supplemental Update
macOS 10.15 Catalina is Now Available on the Mac App Store
Update Directly to macOS Catalina
macOS 10.15 Catalina: How to Mount Root Partition Read/Write for Post-Installation
How to Create a macOS Catalina Public Beta Installation USB
tonymacx86 Clover Theme (Updated for Catalina)
Introducing the macOS Catalina Critter!
Catalina Desktop Support
Catalina Desktop Guides
Catalina Laptop Support
Catalina Laptop Guides
macOS Catalina Public Beta is Now Available
Apple Reveals macOS 10.15 Catalina - Available Fall 2019
 
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Has anyone installed the supplemental update successfully?

An easy and quick update for me too on Clover 5107. A strange yellow flash just before login screen though – "AMD stuff"..?
 
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hi guys,

I am already on Catalina 10.15.4 and everything is running smooth. However Apple released these days a bunch of supplemental updates for the watch, iOS and Catalina. Today I get the notification that a supplemental update for 10.15.4 is available for my computer.
I browsed the forum but couldn't find any posts related to this. Now I wonder if I simply can install this update or if I have to be aware of certain things?
 

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so one can confirm that being on Clover 5107 and on Catalina 10.15.4 will work when I simply click install for the supplemental update w/o upgrading KEXTs and Clover before?
 
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I'm done. just copy and replace CLOVERX64.efi file on EFI partition
 
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If you thought that the application was updated in "Update available", it was an additional update for 10.15.4.
19E287.png
 
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Z370 | 9600K | RX 580 build
截圖 2020-04-09 16.40.52a.png

A 16-minute supplemental update, it should be really fine if the system is already macOS 10.15.4.
 
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