---
title: tvOS 15.1 Release Notes
framework: tvos-release-notes
role: article
role_heading: Article
path: tvos-release-notes/tvos-15_1-release-notes
---

# tvOS 15.1 Release Notes

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

## Overview

Overview The tvOS 15 SDK provides support to develop tvOS apps for Apple TV devices running tvOS 15.1. The SDK comes bundled with Xcode 13, available from the Mac App Store. For information on the compatibility requirements for Xcode 13, see Xcode 13 Release Notes. CoreData Known Issues NSExpression immediately forbids certain operations that have significant side effects, like creating and destroying objects. Additionally, casting string class names into Class objects with NSConstantValueExpression is deprecated. (84017178) Workaround: Pass temporary objects to NSExpression in the context parameter of expressionValue(with:context:), or with NSPredicate as the substitutionVariables parameter of evaluate(with:substitutionVariables:). You can create a derived predicate with all the substitution variables replaced (bound), using withSubstitutionVariables(_:) on an existing NSPredicate so that code using the object can continue to use a simple evaluate(with object: Any?) invocation.

## See Also

### tvOS 15

- [tvOS 15.6 Release Notes](tvos-release-notes/tvos-15_6-release-notes.md)
- [tvOS 15.5 Release Notes](tvos-release-notes/tvos-15_5-release-notes.md)
- [tvOS 15.4 Release Notes](tvos-release-notes/tvos-15_4-release-notes.md)
- [tvOS 15.3 Release Notes](tvos-release-notes/tvos-15_3-release-notes.md)
- [tvOS 15.2 Release Notes](tvos-release-notes/tvos-15_2-release-notes.md)
- [tvOS 15 Release Notes](tvos-release-notes/tvos-15-release-notes.md)