> ## Documentation Index
> Fetch the complete documentation index at: https://docs.mobster.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# Signing for "WebDriverAgentRunner" requires a development team.

> Xcode has no Apple team to sign Mobster's helper with. Choose your Apple Account in Mobster's setup and build again.

You see this: `xcodebuild` prints `error: Signing for "WebDriverAgentRunner" requires a development team. Select a development team in the Signing & Capabilities editor.` Mobster shows `Choose your Apple Account`.

## Why it happens

The helper runs on your iPhone, and iOS only runs apps signed by a team. No team was chosen, or Xcode has no signing certificate for it.

## Fix

1. Sign in to Xcode with your Apple ID: **Xcode › Settings › Accounts**.
2. In Mobster for Mac's setup, choose your Apple Account (your team).
3. If Xcode has no certificate yet, in Accounts choose **Manage Certificates › Apple Development**.
4. Build again.

## Check it worked

The build finishes and `mobster doctor` prints no `✗` line for the runner.

Checked 26 Oct 2026 against Mobster 0.4.0. Back to [Troubleshooting](https://docs.mobster.dev/troubleshooting.md#iphone).


This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.