Subject: .NET iOS Support for Xcode 27 – Expected Release Timeline

Question

Subject: .NET iOS Support for Xcode 27 – Expected Release Timeline

Hirak Desai 5

Hi,

I recently updated Xcode to the latest version, Xcode 27. However, the current .NET iOS workload does not appear to support it yet.

While building my project, I received the following error:

“This version of .NET for iOS (26.5.10318) requires Xcode 26.6. The current version of Xcode is 27.0. Either install Xcode 26.6, or use a different version of .NET for iOS.”

I would like to know:

Is there an expected timeline for when .NET for iOS will support Xcode 27?

Is there currently a preview/nightly version of the .NET iOS workload that supports Xcode 27?

If available, what is the recommended approach for continuing development with Xcode 27 in the meantime?

Environment:

.NET SDK: 10.0.401

.NET iOS workload: 26.5.10318

Xcode: 27.0

Development environment: JetBrains Rider

OS: macOS

Any guidance or information about the planned support timeline would be appreciated.

Thank you.

Hirak Desai 5 Reputation points

2026-09-29T06:07:21.0666667+00:00

https://github.com/dotnet/macios/releases/tag/dotnet-10.0.1xx-xcode27.0-10722
Harry Josh 0 Reputation points

2026-09-30T07:59:18.03+00:00

This is an important topic for developers working with .NET on iOS, especially when Xcode version compatibility affects development and build workflows. It would be helpful to know the expected support timeline and whether any specific .NET version will be required for Xcode 27.

6 answers

Your answer

Hirak Desai 5 Reputation points

2026-09-29T06:07:21.0666667+00:00

https://github.com/dotnet/macios/releases/tag/dotnet-10.0.1xx-xcode27.0-10722
Harry Josh 0 Reputation points

2026-09-30T07:59:18.03+00:00

This is an important topic for developers working with .NET on iOS, especially when Xcode version compatibility affects development and build workflows. It would be helpful to know the expected support timeline and whether any specific .NET version will be required for Xcode 27.

Answer 1

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Answer 2

Bruce (SqlWork.com) 85,456

Another issue you will face upgrading to Xcode 27 are the required code changes to support iOS 27. Once rebuilt with Xcode 27, your application will most likely crash at launch on iOS 27. You need fix the breaking changes in the upgrade to iOS 27.

A known Maui issue is appdelegate is no longer supported:

https://github.com/dotnet/maui/commit/49b62062536b4a2b957d965f76035eb56806615c

If you use any 3rd party nuget packages, you may need to wait for an update to support iOS 27.

note: building and releasing applications built with Xcode 26 is supported for several more months.

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Hirak Desai 5 Reputation points

2026-09-29T06:07:14.0366667+00:00

https://github.com/dotnet/macios/releases/tag/dotnet-10.0.1xx-xcode27.0-10722

Answer 3

Harry Nguyen (WICLOUD CORPORATION) 95 Microsoft External Staff Moderator

Hi @Hirak Desai ,

Thank you for reaching out and for providing the details about your environment.

The current stable .NET 10 iOS workload 26.5.10318 requires Xcode 26.6. The available Xcode 27 preview workload, 27.0.10539-xcode27.0, was released specifically for Xcode 27.0 Beta 6, and its release notes state that Xcode 27.0 Beta 6 is required. Therefore, I would not consider this preview workload officially supported with the final Xcode 27.0 release.

Xcode 27 support is being t racked by the .NET for iOS/macOS team. However, I could not find a published release date for stable support for the final Xcode 27.0 release, so I would recommend following the official .NET for iOS/macOS releases and the Xcode 27 tracking issue for the latest updates rather than relying on a specific timeline.

If you need to continue using the current stable .NET 10 iOS workload, one option is to use a Mac environment that supports Xcode 26.6. Since your current macOS 27 environment does not support the Xcode 26.x series, this would require a compatible macOS environment.

I also looked into the macOS side of this scenario. Apple provides options for installing compatible previous versions of macOS, and also documents using more than one compatible macOS version on separate volumes. This can be useful if you want to explore an earlier compatible environment without immediately replacing your current macOS installation. Availability still depends on the specific Mac model, so I recommend checking Apple's official documentation and compatibility guidance before making any OS-level changes, and backing up your data first.

For now, I would avoid forcing the current stable workload to work with Xcode 27.0, or treating the Beta 6 preview workload as officially supported with Xcode 27.0 final.

If you found my response helpful or informative, I would greatly appreciate it if you could follow this guide for your confirmation.

Hirak Desai 5 Reputation points

2026-09-22T11:26:41.5766667+00:00

Hi Haryy,

Thank you for the detailed clarification.

I understand that the current stable workload requires Xcode 26.6 and that the available 27.0.10539-xcode27.0 preview is only intended for Xcode 27 Beta 6.

Since my development environment is already on macOS 27 Golden Gate + Xcode 27.0 final, downgrading to the Xcode 26.x series is not an option for me.

Could you please let me know if there is any newer preview/nightly .NET iOS workload currently available or planned that supports the final Xcode 27.0?

Even if it is a preview build and not recommended for production, it would be helpful to have a supported option for continuing development until the stable workload is released.

If there is a tracking issue or release where this support is being actively worked on, please share it as well.

Thanks again for your help.
Melissa Warrington 0 Reputation points

2026-09-22T16:05:07.5666667+00:00

I am also encountering the same issue after my macOS updated to 27 Golden Gate overnight. This is preventing development and I would also like to know if it is possible to have preview/nightly version of .NET iOS to develop against until a stable version is released. It seems unrealistic to expect developers to roll back their entire OS because of this, no?
Bruce (SqlWork.com) 85,456 Reputation points

2026-09-22T16:39:21.5133333+00:00

its pretty common for cross platform tools to lag O/S support. Maui is pretty good in only lagging a month or two. Its unusual that a new MacOs release does not support the previous version of Xcode.

nightly builds (not necessarily stable):

https://github.com/dotnet/maui/wiki/Nightly-Builds

you can follow Maui 11 rc2 release issues:

https://github.com/dotnet/maui/issues/38215
Harry Nguyen (WICLOUD CORPORATION) 95 Reputation points Microsoft External Staff Moderator

2026-09-23T02:36:35.75+00:00

Hi @Hirak Desai ,

Thank you for all the information you’ve shared so far. I understand that you’re looking for a practical way to continue development with your current macOS 27 and Xcode 27 setup, and I appreciate the additional context you’ve provided while I look into this further.

I’m continuing to review the available options and the latest updates around this configuration. At this stage, I haven’t identified a workaround that has been sufficiently validated for me to recommend with confidence, and I’d prefer not to suggest an approach that could introduce additional issues into your development environment.

I’ll continue looking into this and share any relevant updates here.
Harry Nguyen (WICLOUD CORPORATION) 95 Reputation points Microsoft External Staff Moderator

2026-09-24T11:04:56.5033333+00:00
Hi @Hirak Desai ,

Thank you for your sharing. I understand that changing your macOS installation is not a practical solution, and I would not recommend erasing or downgrading your Mac as the default response to this issue.

To clarify the current support status as of September 24, 2026:

Stable support: The published release notes for .NET for iOS 26.5.10318 require Xcode 26.6. They do not establish support for Xcode 27.0 final.

Preview support: The documented .NET 10 preview, 27.0.10539-xcode27.0, targets Xcode 27.0 Beta 6. Those requirements do not establish compatibility with Xcode 27.0 final. This does not prove the preview cannot run with the final release, but I cannot recommend that combination as documented supported usage.

Newer builds: I have not identified a published preview/nightly release whose documentation explicitly supports Xcode 27.0 final. The existing release notes also explain how to opt into Xcode 27 preview bindings, but still require Beta 6, so that configuration is not a confirmed workaround for your setup.

Timeline: I could not verify a published stable-release date from the official release information and tracking issue. Therefore, the October/November estimates mentioned earlier should not be treated as a Microsoft commitment. dotnet/macios/releases

Recommended next step Please follow the dedicated Xcode 27.0 Support tracking issue and the .NET for iOS/macOS releases. The tracking issue is the appropriate place to request confirmation of a build validated against Xcode 27.0 final, together with its workload-set installation instructions. macios/issues/25660

For your exact macOS 27 + Xcode 27.0 final configuration, I do not currently have a verified supported workload or installation command to provide. The available documentation confirms Beta 6 preview support, but does not resolve final-release compatibility. I appreciate that this leaves development blocked, and I do not want to present an unverified workaround as a solution.

If this instruction is applicable to your situation, I would greatly appreciate it if you could follow the instruction here so others experiencing similar behavior can benefit from it as well.
Harry Nguyen (WICLOUD CORPORATION) 95 Reputation points Microsoft External Staff Moderator

2026-09-28T07:36:42.55+00:00

Hi @Hirak Desai ,
I wanted to check if there are any updates or further questions on your side regarding this issue. Please feel free to let me know if you need any additional assistance.
Harry Nguyen (WICLOUD CORPORATION) 95 Reputation points Microsoft External Staff Moderator

2026-09-29T06:39:16.5933333+00:00
Hi @Hirak Desai ,

Based on the latest release information, Xcode 27.0 support is now available for .NET 10.

To use Xcode 27.0, I would recommend updating the related components to the versions specified in the release:

macOS 26.6 or later (Tahoe), which is required by Xcode 27.0.

Xcode 27.0.

.NET SDK 10.0.401.

Workload set 10.0.401.1.

For .NET MAUI projects, .NET MAUI 10.0.110 (SR 11) or later is recommended.

Before updating the workloads, you can first verify the installed .NET SDK:

dotnet --version

Please make sure it reports:

10.0.401

Then install or update the required workload using the workload set from the release. For example, for .NET MAUI:

dotnet workload install maui --version 10.0.401.1

If you are working specifically with the iOS workload, you can use:

dotnet workload install ios --version 10.0.401.1

The corresponding .NET for iOS SDK in this release is 27.0.10722.

Rebuild the existing project

After updating the .NET SDK and .NET for iOS workload, clean and rebuild the existing project so that it uses the updated toolchain.

You can first try:

dotnet clean dotnet restore dotnet build

If you want to ensure that no previous build artifacts are being reused, remove the bin and obj folders before rebuilding:

rm -rf bin obj dotnet restore dotnet build

Then reproduce the issue using the existing project.

If the issue still occurs, create a new blank project with the updated environment and test it again. This can help determine whether the behavior is related to the existing project or the updated SDK/workload and Xcode environment.

For reference, you can find the complete compatibility and installation details in the .NET 10 - Xcode 27.0 support release.

If you found my response helpful or informative, I would greatly appreciate it if you could follow this guide for your confirmation.

Thank you.

Answer 4

Hi,

Thank you for the information.

I have one additional concern regarding the recommendation to install Xcode 26.6.

My development machine is already running macOS 27 (Golden Gate), and I have removed Xcode 26.6.

As I understand it, Xcode 26.6 requires macOS Tahoe 26.2 or later, while Xcode 26 does not run on macOS 27 (Golden Gate).

Therefore, installing Xcode 26.6 does not appear to be a viable option for my current environment.

My current environment is:

macOS: 27 (Golden Gate)

Xcode: 27.0

.NET SDK: 10.0.401

.NET iOS workload: 26.5.10318

IDE: JetBrains Rider

Project: .NET MAUI

The current workload gives me the following error:

“This version of .NET for iOS (26.5.10318) requires Xcode 26.6. The current version of Xcode is 27.0. Either install Xcode 26.6, or use a different version of .NET for iOS.”

I also noticed that the .NET for iOS releases contain a preview build for Xcode 27:

.NET 10 – Xcode 27.0 Beta 6 support (27.0.10539-xcode27.0)

However, the release notes indicate that this build requires Xcode 27.0 Beta 6.

Since I am now using the final Xcode 27.0 on macOS 27 Golden Gate, could someone please clarify:

Is there a .NET 10 iOS workload that officially supports the final Xcode 27.0?

Can the 27.0.10539-xcode27.0 preview workload be used with the final Xcode 27.0?

If not, is there another preview/nightly workload that supports the final Xcode 27.0?

What is the recommended solution for developers who are already on macOS 27 Golden Gate, where Xcode 26.x cannot be used?

Is there an expected timeline for the stable .NET 10 iOS workload supporting Xcode 27.0?

I cannot simply switch back to Xcode 26.6 without also changing the macOS environment, so I would like to understand the supported migration path for developers who have already moved to macOS 27.