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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)

  • Begin the update by going to Catalina on the App Store or open Software Update directly by Choosing Apple menu  > System Preferences, then click Software Update.
  • Alternatively 10.15.3 can be updated to with a standalone installer downloaded from the Apple’s support page:

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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