macOS Catalina 10.15.5 Release Notes
Update your apps to use new features, and test your apps against API changes.
Overview
The macOS 10.15.4 SDK provides support to develop apps for Macs running macOS Catalina 10.15.5. The SDK comes bundled with Xcode 11.5, available from the Mac App Store. For information on the compatibility requirements for Xcode 11.5, see Xcode 11.5 Release Notes.
Finder
Resolved Issues
Large data transfers to RAID volumes no longer cause Finder to become unresponsive. (61307708)