XcodesOrg / XcodesOrg/xcodes

Unable to Download Runtimes

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Dominant language
Swift
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Description

I'm unable to download Xcode runtime with version 26.0 and 26.1 using CLI.

Command:

xcodes runtimes install "iOS 26.1" --aria2 "$(which aria2c)"

I have also tried without aria2 and ends up with this error.

Downloading Runtime iOS 26.1: 0%
Error: ProcessExecutionError()

It worked if I used iOS 18.x.

Xcodes Version: 1.6.2
Xcode: 26.0.1

➜  xcode-select -p
/Applications/Xcode-26.0.1.app/Contents/Developer

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reproducing the runtime installation command for iOS 26.0 or 26.1, both with and without aria2, using the reported Xcodes and Xcode versions. Trace the CLI path that reports ProcessExecutionError and compare it with a working iOS 18.x download. Done means the affected runtimes download successfully through the CLI.

Written by the indexing model from the issue text.

Assessment

Tech stack
swift
Domain
cli
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Quiet
Clarity
Mostly clear
Newbie friendliness
52/100

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