"No private IP address found" error throwed on MacOS

running an example on local macOS , but got ` No private IP address found` error when execute `memberlist.Create`

```
Failed to get final advertise address: No private IP address found, and explicit IP not provided
```

The report names the memberlist.Create entry point and the "No private IP address found" error; start by reproducing the example on local macOS and tracing address selection from that entry point. Determine the expected behavior when no private address is detected, then verify the resulting fix with the relevant example or test.

Written by the indexing model from the issue text.