# Xcode 15 RC Released - Important Notice for visionOS SDK Users!

**URL:** <https://discuss.circleci.com/t/xcode-15-rc-released-important-notice-for-visionos-sdk-users/49278>\
**Category:** Announcements\
**Tags:** xcode\
**Created:** [September 18, 2023, 3:35pm UTC](https://discuss.circleci.com/t/xcode-15-rc-released-important-notice-for-visionos-sdk-users/49278 "2023-09-18T15:35:10Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![bytesguy](https://avatars.discourse-cdn.com/v4/letter/b/0ea827/32.png) [@bytesguy](https://discuss.circleci.com/u/bytesguy)\
**Post date:** [September 18, 2023, 3:35pm UTC](https://discuss.circleci.com/t/xcode-15-rc-released-important-notice-for-visionos-sdk-users/49278/1 "2023-09-18T15:35:10Z")

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The Xcode 15 RC image has been released on **M1 and Gen2 Intel resource classes** and can be selected as follows:

```auto
macos:
    xcode: 15.0.0

```

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**Note: This replaces Xcode 15 Beta 8 as per [our image policy](https://circleci.com/docs/xcode-policy/)**

## 🚨 Notable Changes 🚨

- This image is built on macOS 13.5.1
- Ruby 2.7 will no longer ship with Xcode 15 and higher images. This is due to the Ruby project project ending support for Ruby 2.7 in March 2023.
- The default Ruby will now be Ruby 3.1

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## **⚠ For visionOS SDK Users ⚠**

If you are using visionOS SDK in your project, your project will fail when building against Xcode 15 RC.

Apple did not include visionOS SDK in the Xcode 15 RC release.

Therefore, please use the `15.0.8` image tag to point your project to Xcode 15 Beta 8, which includes the latest release of visionSDK Beta.

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## 🐛 Known Issues 🐛

There is a known issue in Xcode 15 which causes the simulator runtimes to be slow to launch:

[https://developer.apple.com/documentation/xcode-release-notes/xcode-15-release-notes#Known-Issues](https://developer.apple.com/documentation/xcode-release-notes/xcode-15-release-notes#Known-Issues)

For discussion on this topic, please see:

> [@Severe performance problems with Xcode 15](https://discuss.circleci.com/t/severe-performance-problems-with-xcode-15/49205/25):
>
> After some time investigating our builds using the macos.m1.medium.gen1 resource class and also inspecting local builds I found that even for a trivial Xcode project the test suite never launches. While attempting to debug via SSH any operations through xcrun simctl spawn take at least several seconds to return, if more than one simulator is booted this can be as long as a minute. The workaround for now seems to be to use macos.m1.large.gen1, however as noted by others runtime here is about do…

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ℹ **M1 VM Image Info** ℹ

Xcode 15.0 Build version `15A240d` is installed at `/Applications/Xcode-15.app`

The full manifest of installed software can be found [here](https://circle-macos-docs.s3.amazonaws.com/image-manifest/v13456/manifest.txt)

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ℹ **Intel VM Image Info** ℹ

Xcode 15.0 Build version `15A240d` is installed at `/Applications/Xcode-15.app`

The full manifest of installed software can be found [here](https://circle-macos-docs.s3.amazonaws.com/image-manifest/v13456/manifest.txt)

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For assistance, please create new threads in the Mobile section of the forum ([Mobile - CircleCI Discuss](https://discuss.circleci.com/c/mobile/7)) for community support.

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<div class="post-metadata">

**Author:** ![bytesguy](https://avatars.discourse-cdn.com/v4/letter/b/0ea827/32.png) [@bytesguy](https://discuss.circleci.com/u/bytesguy)\
**Post date:** [September 18, 2023, 12:44pm UTC](https://discuss.circleci.com/t/xcode-15-rc-released-important-notice-for-visionos-sdk-users/49278/2 "2023-09-18T12:44:28Z")

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