fix flutter app work fine in wondows but not run in macos

I am looking for a Flutter developer who can fix my app that is currently experiencing issues on macOS. The app crashes on startup and I am receiving error messages.

Skills and experience needed:
- Proficiency in Flutter development
- Experience in troubleshooting and fixing app crashes
- Familiarity with macOS
- Ability to analyze and understand error messages to identify the root cause of the issue
- Strong problem-solving skills and attention to detail