Understanding the Warning Email

Oct 13, 2025 by magicalceylontours.com 118 views

Upgrading to iOS SDK Version 18: A Step-by-Step Guide

Introduction

As an iOS developer, you're likely no stranger to the constant updates and changes in the Apple ecosystem. Recently, Apple has announced that starting April 24, 2025, all iOS and iPadOS apps must be built with the iOS 18 SDK or later, included in Xcode 16 or later, in order to be uploaded to App Store Connect or submitted for distribution. This means that if you're still using an older version of the SDK, you'll need to upgrade to the latest version to avoid any issues with your app's delivery.

Understanding the Warning Email

If you've been receiving warning emails from App Store Connect, you're not alone. The email typically looks like this:

Hello,

We noticed one or more issues with a recent delivery for the following app:
Acter
Version 1.25.13130
Build 1741832286
Although delivery was successful, you may want to correct the following issues in your next delivery. Once you've corrected the issues, upload a new binary to App Store Connect.

ITMS-90725: SDK version issue - This app was built with the iOS 17.5 SDK. Starting April 24, 2025, all iOS and iPadOS apps must be built with the iOS 18 SDK or later, included in Xcode 16 or later, in order to be uploaded to App Store Connect or submitted for distribution.

Apple Developer Relations

Why Upgrade to iOS SDK Version 18?

Upgrading to the latest iOS SDK version is essential for several reasons:

Security: The latest SDK version includes security patches and updates that help protect your app and its users from potential threats.
Performance: The latest SDK version often includes performance improvements that can enhance your app's overall user experience.
Compatibility: The latest SDK version is designed to work seamlessly with the latest versions of iOS and iPadOS, ensuring that your app remains compatible with the latest devices and operating systems.

How to Upgrade to iOS SDK Version 18

Upgrading to the latest iOS SDK version is a relatively straightforward process. Here's a step-by-step guide to help you get started:

Step 1: Check Your Current SDK Version

Before you start upgrading, it's essential to check your current SDK version. You can do this by opening your Xcode project and navigating to the Product menu. Select Edit Scheme, and then click on the Build tab. Look for the Base SDK field, which should indicate the current SDK version.

Step 2: Update Xcode to the Latest Version

To upgrade to the latest iOS SDK version, you'll need to update Xcode to the latest version. You can do this by opening the App Store and searching for Xcode. Click on the Get button to download and install the latest version.

Step 3: Update Your Project to Use the Latest SDK Version

Once you've updated Xcode, you'll need to update your project to use the latest SDK version. You can do this by opening your Xcode project and navigating to the Product menu. Select Edit Scheme, and then click on the Build tab. Look for the Base SDK field and select the latest SDK version from the dropdown menu.

Step 4: Clean and Rebuild Your Project

After updating your project to use the latest SDK version, you'll need to clean and rebuild your project to ensure that all the necessary files are updated. You can do this by navigating to the Product menu and selecting Clean. Then, select Build to rebuild your project.

Troubleshooting Common Issues

If you're experiencing issues while upgrading to the latest iOS SDK version, here are some common troubleshooting tips to help you resolve the problem:

SDK Version Not Found: If you're unable to find the latest SDK version in the Base SDK field, try updating Xcode to the latest version and then updating your project.
Build Errors: If you're experiencing build errors after updating your project, try cleaning and rebuilding your project to ensure that all the necessary files are updated.
SDK Version Conflict: If you're experiencing a SDK version conflict, try updating your project to use the latest SDK version and then cleaning and rebuilding your project.

Conclusion

Upgrading to the latest iOS SDK version is essential for ensuring that your app remains compatible with the latest versions of iOS and iPadOS. By following the step-by-step guide outlined in this article, you can easily upgrade to the latest iOS SDK version and avoid any issues with your app's delivery. Remember to always check your current SDK version, update Xcode to the latest version, update your project to use the latest SDK version, and clean and rebuild your project to ensure that all the necessary files are updated.
iOS SDK Version 18: Frequently Asked Questions

Introduction

As you upgrade to the latest iOS SDK version, you may have some questions about the process and what to expect. In this article, we'll answer some of the most frequently asked questions about upgrading to iOS SDK version 18.

Q: What is the minimum Xcode version required to use iOS SDK version 18?

A: The minimum Xcode version required to use iOS SDK version 18 is Xcode 16.

Q: Can I still use Xcode 15 to build my app with iOS SDK version 18?

A: No, you cannot use Xcode 15 to build your app with iOS SDK version 18. Xcode 15 only supports up to iOS SDK version 17.5, and you'll need to use Xcode 16 or later to use iOS SDK version 18.

Q: How do I know if my app is compatible with iOS SDK version 18?

A: You can check your app's compatibility with iOS SDK version 18 by opening your Xcode project and navigating to the Product menu. Select Edit Scheme, and then click on the Build tab. Look for the Base SDK field, which should indicate the current SDK version. If your app is using an older SDK version, you'll need to update it to use iOS SDK version 18.

Q: Can I use iOS SDK version 18 with older versions of Xcode?

A: No, you cannot use iOS SDK version 18 with older versions of Xcode. iOS SDK version 18 is only compatible with Xcode 16 or later.

Q: What are the benefits of using iOS SDK version 18?

A: The benefits of using iOS SDK version 18 include:

Security: iOS SDK version 18 includes security patches and updates that help protect your app and its users from potential threats.
Performance: iOS SDK version 18 includes performance improvements that can enhance your app's overall user experience.
Compatibility: iOS SDK version 18 is designed to work seamlessly with the latest versions of iOS and iPadOS, ensuring that your app remains compatible with the latest devices and operating systems.

Q: How do I update my project to use iOS SDK version 18?

A: To update your project to use iOS SDK version 18, follow these steps:

Open your Xcode project and navigate to the Product menu.
Select Edit Scheme, and then click on the Build tab.
Look for the Base SDK field and select iOS SDK version 18 from the dropdown menu.
Clean and rebuild your project to ensure that all the necessary files are updated.

Q: What if I encounter issues while updating my project to use iOS SDK version 18?

A: If you encounter issues while updating your project to use iOS SDK version 18, try the following troubleshooting tips:

SDK Version Not Found: If you're unable to find iOS SDK version 18 in the Base SDK field, try updating Xcode to the latest version and then updating your project.
Build Errors: If you're experiencing build errors after updating your project, try cleaning and rebuilding your project to ensure that all the necessary files are updated.
SDK Version Conflict: If you're experiencing a SDK version conflict, try updating your project to use iOS SDK version 18 and then cleaning and rebuilding your project.

Q: What is the deadline for upgrading to iOS SDK version 18?

A: The deadline for upgrading to iOS SDK version 18 is April 24, 2025. After this date, all iOS and iPadOS apps must be built with iOS SDK version 18 or later to be uploaded to App Store Connect or submitted for distribution.

Conclusion

Upgrading to iOS SDK version 18 is an essential step in ensuring that your app remains compatible with the latest versions of iOS and iPadOS. By following the step-by-step guide outlined in this article and answering some of the most frequently asked questions, you can easily upgrade to the latest iOS SDK version and avoid any issues with your app's delivery.