same issue here macOS 15.4 (24E248) Xcode 16.0 (16A242d) &16.2 (16C5032a) run any simulator will hit Couldn't find the Objective-C runtime library in loaded images. Message from debugger: The LLDB RPC server has crashed. You may need to manually terminate your process. The crash log is located in ~/Library/Logs/DiagnosticReports and has a prefix 'lldb-rpc-server'. Please file a bug and attach the most recent crash log.