Apple (xip, downloads):

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

Peter Witham:

Is this new in Xcode 27? Pretty sure it as and I approve whole heartedly! I really hate setting up Xcode settings more than once.

Christian Beer:

Building with Xcode 27 doesn’t work because of some intransparent XCStrings error… and I even can’t check with Xcode 26 anymore because Apple decided to not let me run it on macOS 27…

Steven Woolgar:

After all these years Apple has finally broken cmd-e in Xcode 27.

Previously:

• iPhone Duo
• Ending the Golden Era for Backward-Compatible Apps
• Xcode 26.6
• Xcode 27’s Device Hub
• Swift 6.4
• Xcode 27 Announced

Update (2026-09-18): Jesse Squires:

Xcode 27 seems to have broken UI appearance vs Editor appearance. They used to be separate settings.

For example, previously, the app could be light mode while the editor theme was dark.

But now, you choose a dark editor theme and the whole app goes to dark mode.

I hate this.

Me, too.

Update (2026-09-24): Christian Beer:

• generate stubs for protocol: uses wrong class names
• fix for missing parameter: inserts it at the wrong position
• generating init with Bindings, State, etc.: mostly wrong

Update (2026-10-01): Steve Troughton-Smith:

AI code completion was such a nothingburger, for all of that investment. I don’t even have it turned on in Xcode anymore. If you’re into code completion, you’re into using Codex and Claude, so why would you ever use it now.

The built-in Xcode stuff has pretty much never worked at all for me. I either get errors or it does nothing.

Artificial Intelligence Dark Mode Device Hub Mac macOS 27 Golden Gate macOS Tahoe 26 Programming Swift Assist Swift Programming Language Xcode