---
title: macOS Catalina 10.15.4 Release Notes
framework: macos-release-notes
role: article
role_heading: Article
path: macos-release-notes/macos-catalina-10_15_4-release-notes
---

# macOS Catalina 10.15.4 Release Notes

Update your apps to use new features, and test your apps against API changes.

## Overview

Overview The macOS 10.15.4 SDK provides support to develop apps for Macs running macOS Catalina 10.15.4. The SDK comes bundled with Xcode 11.4, available from the Mac App Store. For information on the compatibility requirements for Xcode 11.4, see Xcode 11.4 Release Notes. Endpoint Security New Features Using a custom Mach service name is now supported for XPC between apps and extensions. See Endpoint Security for more information. (57244148) Music New Features The Music app now supports time-synced lyrics for Apple Music subscribers. (53877474) Safari New Features Content Blocker extensions delivered with Mac Catalyst apps are now available for use in Safari. (43646265)

## See Also

### macOS 10.15

- [macOS Catalina 10.15.6 Release Notes](macos-release-notes/macos-catalina-10_15_6-release-notes.md)
- [macOS Catalina 10.15.5 Release Notes](macos-release-notes/macos-catalina-10_15_5-release-notes.md)
- [macOS Catalina 10.15.3 Release Notes](macos-release-notes/macos-catalina-10_15_3-release-notes.md)
- [macOS Catalina 10.15.2 Release Notes](macos-release-notes/macos-catalina-10_15_2-release-notes.md)
- [macOS Catalina 10.15.1 Release Notes](macos-release-notes/macos-catalina-10_15_1-release-notes.md)
- [macOS Catalina 10.15 Release Notes](macos-release-notes/macos-catalina-10_15-release-notes.md)