UsbSerialForMacOS is a .NET binding for a native Swift library that enables serial port communication on macOS and Mac Catalyst.
It allows .NET MAUI and .NET 10+ apps to enumerate, open, read from, and write to serial devices (such as USB-to-serial adapters and 3D printers) using a simple C# API.

1. Add the NuGet package to your .NET 10+ Mac or Mac Catalyst project.
2. Add following to Entitlements.plist

<key>com.apple.security.device.serial</key>
<true/>

3. Use the UsbSerialManager class to enumerate and communicate with serial devices.

using UsbSerialForMacOS;

var manager = new UsbSerialManager();
var ports = manager.AvailablePorts();
if (ports.Length > 0)
{
    bool opened = manager.Open(ports[0], 115200);
    // Write/read as needed
    manager.Close();
}

Version Support

.NET 10.0 or higher is required. Native libraries are included for both macOS and Mac Catalyst.