---
tags:
  - macOS
  - Tahoe
  - scutil
  - networking
  - system-configuration
  - terminal
title: Managing System Configuration with Scutil on macOS Tahoe
---

# Managing System Configuration with Scutil on macOS Tahoe

`scutil` (System Configuration Utility) is a command-line tool used to manage system configuration parameters on macOS. It is particularly useful for managing computer names and troubleshooting DNS issues.

## Managing Computer Names

macOS has three different names for your computer, and they can sometimes get out of sync. `scutil` allows you to view and set them individually.

### The Three Names
1.  **ComputerName**: The user-friendly name seen in Finder and AirDrop (e.g., "John's MacBook Pro").
2.  **LocalHostName**: The name used for local network services like Bonjour (e.g., "Johns-MacBook-Pro.local").
3.  **HostName**: The name used in the terminal and by SSH (e.g., "johns-mbp").

### Viewing Names

To see the current values:

```zsh
scutil --get ComputerName
scutil --get LocalHostName
scutil --get HostName
```

### Setting Names

To change these names, you need `sudo` privileges.

```zsh
sudo scutil --set ComputerName "Tahoe-Workstation"
sudo scutil --set LocalHostName "Tahoe-Workstation"
sudo scutil --set HostName "tahoe-workstation"
```

## Troubleshooting DNS

If you are having internet connectivity issues or can't reach specific websites, `scutil` provides a detailed view of how macOS is resolving DNS.

To show the current DNS configuration:

```zsh
scutil --dns
```

This outputs a list of resolvers.
*   **resolver #1**: This is usually your primary DNS configuration (from Wi-Fi or Ethernet).
*   Look for `nameserver[0]` to see which DNS server your Mac is actually querying (e.g., `8.8.8.8` or your router's IP).

## Checking Proxy Settings

To see if a system-wide proxy is configured:

```zsh
scutil --proxy
```

## Monitoring Network Reachability

You can use `scutil` to check if a specific host is reachable according to the system's routing table.

```zsh
scutil -r google.com
```

**Output:**
*   `Reachable`: The system has a route to the host.
*   `ConnectionRequired`: You might need to initiate a VPN or dial-up connection.

For more networking tools, refer to Networking Commands on macOS Tahoe.