Hackintosh Catalina 10.15.3 Update Guide

The 10.15.3 update is the third major update for macOS Catalina and contains no changes that will affect hackintoshing besides containing security improvements.

10.15.3 Update Notes:

  • Contains a security update
  • Optimizes gamma handling of low gray levels on Pro Display XDR for SDR workflows when using macOS
  • Improves multi-stream video editing performance for HEVC and H.264-encoded 4K video on the MacBook Pro (16-inch, 2019)

For more detailed information about this update, please visit: https://support.apple.com/kb/HT210642

Hackintosh 10.15.3 Install Overview

Download the macOS Catalina 10.15.3 Update (Build 19D76)

Hackintosh 10.15.3 USB Patch

A USB port-limit patch is used to increase the number of allowed USB ports in macOS, useful for a motherboards with plently of USB3 ports. A port-limit patch can be used to inject missing USB3 ports by increasing the port limit.

The update works with the same USB Port-limit Patch from 10.15.0 If updating from a version of macOS before Catalina you’ll need to add it and remove or disable any previous port-limit patches.


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I’ll admit that I’m new to the game here. Have a 2011 Mac Mini that’s been running 10.15.2 really well, but just ran into an issue where new software won’t install unless it’s been updated to 10.15.3. Do you have any suggestions for finding more specific instructions on updating to 10.15.3? I downloaded the update package, but am not sure where to go from here. I just keep getting the error that the system is not supported. Thanks!! 🙂