The issue [ERROR:flutter/shell/platform/darwin/graphics/FlutterDarwinContextMetalImpeller.mm(42)] Using the Impeller rendering backend. Lost connection to device often occurs due to compatibility problems with certain Flutter packages. In my case, this issue was caused by the Flutter_downloader package. It appears that this package conflicts with the updated Impeller rendering backend used in Flutter on Darwin (macOS/iOS) platforms. Such issues usually arise when the package's dependencies or implementation are not fully compatible with the latest Flutter framework or the rendering pipeline. Ensuring the package is updated to its latest version or checking for alternative solutions can help resolve this problem.