Prior to iOS 26.0 we were able to download specific simulator runtimes from the command line by using a command like xcodebuild -downloadPlatform iOS -buildVersion 18.0
This is described in the documentation here.
This no longer works for 26.x. If I run the following command:
"xcodebuild -downloadPlatform iOS -buildVersion 26.0" it fails with the following error:
"Finding content... iOS 26.0 is not available for download."
If I omit the -buildVersion flag it will download the latest version, currently 26.2, but if I try and specify 26.2 as the buildVersion I still get "iOS 26.2 is not available for download".
This behavior has been confirmed on Xcode 26.2.
Perhaps related, it appears these runtimes are also no longer being made available for download on https://developer.apple.com/download/all