As we connect more and more devices to our local network, ensuring their security becomes paramount. One way to check for any potential threats is to scan your network to detect any unauthorized devices that may have accessed it. This task can be accomplished quickly and easily using Terminal on macOS.

Here’s how to scan your local network with Terminal on macOS:

Step 1: Open Terminal

To begin, open the Terminal app. You can access it by navigating to Applications > Utilities > Terminal or using the Spotlight search feature on your Mac.

Step 2: Determine Your IP Address

Next, you need to find your IP address. Type the following command in your Terminal window:

ifconfig | grep broadcast

This will display your network details, including your IP address. Your IP address will be a series of numbers that follow “inet “.

Step 3: Ping Your Network

Now that you have your IP address, you can scan your local network. Type the following command in your Terminal window:

nmap -sn 192.168.1.0/24

Replace “192.168.1.” with the first three numbers of your IP address. This command tells the Terminal to send a ping sweep to every device on the network (i.e., every address from 192.168.1.1 to 192.168.1.255) and then report back the results.

Step 4: Review the Results

Once the scan is complete, the report will show you a list of all the devices detected on your network. You should see the IP address and device name (if available) of each device on your network.

Take a look at the list and identify any devices that you do not recognize. If you find any unknown devices, you may want to investigate them further to ensure that they are not a security risk.

In conclusion, scanning your local network with Terminal on macOS is a simple and effective way to monitor the devices connected to your network. By following the steps above, you can quickly identify any unknown devices and take appropriate actions to protect your network from potential threats.