Customer Support Pop-Up Calls Integration

I need a skilled professional to set up pop-up calls for customer support on a desktop application. The pop-up calls should be integrated seamlessly and support both Windows and macOS operating systems.

Ideal Skills and Experience:
- Proficiency in desktop application development
- Experience with customer support software integration
- Familiarity with both Windows and macOS systems
- Ability to ensure seamless pop-up call functionality