Apple (xip, downloads):

Xcode 27.1 includes Swift 6.4 and SDKs for iOS 27.1, iPadOS 27, tvOS 27, watchOS 27, macOS 27, and visionOS 27. Xcode 27.1 supports on-device debugging in iOS 17 and later, tvOS 17 and later, watchOS 10 and later, and visionOS. Xcode 27.1 requires a Mac running macOS Tahoe 26.6 or later.

Christian Beer:

You can’t run macOS UI tests on Xcode cloud as soon as your app uses „restricted entitlements“[…]

Previously:

• Jumping to 27.2
• Xcode 27
• Developing for iPhone Duo