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Add macOS resolver section in README.md #1

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Expand Up @@ -77,3 +77,39 @@ Restart `systemd-resolved`:
```
sudo systemctl restart systemd-resolved
```

#### Add a resolver to `systemd-resolved` (macOS)

Ensure that the `/etc/resolver` directory exists. If not:

```
sudo mkdir /etc/resolver
```

Make and populate a resolver file for each development domain:

```
sudo touch /etc/resolver/test && sudo echo "nameserver 127.0.0.1" | sudo tee /etc/resolver/test
```

```
sudo touch /etc/resolver/internal && sudo echo "nameserver 127.0.0.1" | sudo tee /etc/resolver/internal
```

Run `sudo killall -HUP mDNSResponder` to flush the local DNS cache.

Run `scutil --dns` to verify that the new resolvers are working. You should see something like the following in the output:

```
resolver #8
domain : test
nameserver[0] : 127.0.0.1
flags : Request A records, Request AAAA records
reach : 0x00030002 (Reachable,Local Address,Directly Reachable Address)

resolver #9
domain : internal
nameserver[0] : 127.0.0.1
flags : Request A records, Request AAAA records
reach : 0x00030002 (Reachable,Local Address,Directly Reachable Address)
```