The concept of "limite de velocidade" or speed limit is crucial in network management, especially for ensuring fair bandwidth distribution and preventing network congestion. In the Apple environment, particularly macOS, users and administrators may need to monitor and control network speed limits to optimize performance and maintain a stable network. While macOS does not have built-in tools specifically named for setting speed limits, it offers various methods to monitor and control network usage.

In this article, we will explore how to monitor network speed and control bandwidth usage on macOS using built-in tools and third-party applications. This is important for users who need to manage network resources effectively, especially in environments with multiple devices or limited bandwidth.

Examples:

1. Monitoring Network Speed with Activity Monitor:

   Activity Monitor is a built-in utility in macOS that provides real-time information about system performance, including network usage.

   • Open Activity Monitor:

     Applications > Utilities > Activity Monitor

   • Click on the "Network" tab to view the current network usage, including data sent and received.

2. Using Terminal to Monitor Network Traffic:

   The nettop command in Terminal provides detailed information about network connections and traffic.

   • Open Terminal:

     Applications > Utilities > Terminal

   • Run the nettop command:

     nettop

   • This command will display real-time network statistics, including bandwidth usage per process.

3. Controlling Bandwidth with Third-Party Applications:

   While macOS does not have built-in tools for setting bandwidth limits, third-party applications like TripMode can help control and limit network usage.

   • Download and install TripMode from the official website.
   • Once installed, TripMode allows you to control which applications can access the internet and set data limits, effectively managing bandwidth usage.

4. Using pfctl for Advanced Network Management:

   For advanced users, macOS includes pfctl, a command-line utility for managing packet filtering and network address translation (NAT).

   • Open Terminal:

     Applications > Utilities > Terminal

   • Enable packet filtering:

     sudo pfctl -e

   • Create a configuration file to define rules for bandwidth control. For example, create a file named pf.conf with the following content:

     altq on en0 cbq bandwidth 100Mb queue { std }
     queue std bandwidth 80% cbq(default)

   • Load the configuration:

     sudo pfctl -f /path/to/pf.conf
     sudo pfctl -sr