The Xcode 26.5 beta 3 image has been released and can be selected as follows:
macos:
xcode: 26.5.0
Apple Developer Documentation

Apple Silicon VM Image Info 
Xcode 26.5 beta 3 Build version 17F5032f is installed at /Applications/Xcode-26.5.app
The full manifest of installed software can be found here
My iPhone 16/18.6 builds are failing on this image even though the manifest says this simulator should be available. Anyone else?
I just checked using SSH and iOS 18 is not installed at all, despite what the manifest above says. @fritz-circleci do you know when the release candidate image will be available and if this bug will be fixed?
OK - it looks like you’ve quietly shipped the RC1 image (no update posted on here) and the manifest confirms you have not included iOS 18 in the image. WHY? https://circle-macos-docs.s3.amazonaws.com/image-manifest/v18108/manifest.txt
EDIT: Still no useful explanation from CircleCI support or any further updates on here. What is going on?
@lukeredpath Excuse the delay in response. I completely missed this message. For urgent requests please reach out to support as you’ll more likely get an immediate response.
It seems that image built for Xcode 26.5 RC was mistakenly built without the ios18 simulators. I’ll will release Xcode 26.5 shortly with that simulators shortly