When trying to build and run our iOS app on the simulator we're hitting the following error: Could not attach to pid: "XXXXX" failed to get reply to handshake packet within timeout of 6.0 seconds I've included some more details on our project/setup below: We're working on a large project with multiple schemes / app targets. The error only affects one of our targets - however the dependencies between the problematic target and the others are very similar. The issue only affects building to the simulator; building to a physical device works fine. Scheme configuration is the same across all targets. We've faced this issue on multiple versions of Xcode, from 15.x through to the latest 16.3 RC. We've tried a number of workarounds, some of which work intermittently for some colleagues - but none of which have provided a durable solution. These include varying combinations of: Setting the IDEPreferLogStreaming=YES environment variable Unchecking Debug Executable under Edit Scheme -> Run Manually launching the app on the Simulator and then attaching the debugger using Debug -> Attach in Xcode Erasing all contents and settings on the simulator (this sometimes fixes things for a single build, but we run into the same issue again for all subsequent builds, and it doesn't work for all developers). Clearing out Derived Data and running a clean build (this doesn't seem to help). We'd really appreciate any input on how we can diagnose what's causing this issue or any suggested steps to help resolve it.