Bandwidth Monitors

Bandwidth Monitors display live upload and download throughput for a router, gateway, network interface, or other device. They appear in the Monitors section of the main window.

What can be monitored

A Bandwidth Monitor can pull data from:

• Your internet router via UPnP (auto-discovered during First Time Setup) or SNMP.
• A local network interface on your Mac (Wi-Fi, Ethernet, USB tethering, VPN).
• SNMP-enabled network devices (switches, access points, NAS, servers) added manually via Configuration Assistant.

Section header

Bandwidth Monitors share the header of the Monitors section with your other monitors. Its Split View button draws download above the middle of each bandwidth graph and upload below it. Its Shared Y-Axis Scale → Bandwidth puts every bandwidth monitor on one scale.

Reading the graph

Each monitor shows live upload (↑) and download (↓) throughput, plus a graph of recent activity. Hover over an expanded graph to reveal the graph toolbar below.

A single monitor packs more detail than it first appears:

Along the top of each monitor, from left to right:

• Disclosure triangle — expands or collapses the monitor’s graph, leaving just the title and throughput visible.
• Status light — a colored dot showing the monitor’s current state: green for Active, yellow for No Data or Initializing, red for Error, and grey for Disabled. A monitor that can’t reach its device shows Error with the reason, and doesn’t stay on Starting…. For a UPnP router, that happens after 30 seconds of search.
• Symbol — the icon representing device or interface being monitored. This can be configured in Settings → Bandwidth Monitor.
• Name — the monitor’s label. Set this in Settings → Bandwidth Monitor.
• Download speed — current inbound throughput, marked with a down arrow (↓).
• Upload speed — current outbound throughput, marked with an up arrow (↑).

The graph itself adds a couple more details:

• Fuel gauges — the slim bars beside the monitor title fill up to show current upload and download speed relative to the device’s maximum bandwidth. Enable or disable them from Settings → Display.
• Maximum bandwidth lines — the dashed lines mark the maximum inbound and outbound bandwidth for the device, with optional numeric labels. This shows the configured theoretical maximum bandwidth for the given device or interface. Configure the maximum bandwidth under Bandwidth Options.

Configuring

Add, remove, and customize Bandwidth Monitors from Settings → Bandwidth Monitor, where you can adjust polling intervals, units, colors, alert thresholds, and more.

Graph toolbar

The same graph toolbar appears on both Bandwidth Monitors and Latency Monitors. Hover over an expanded graph to reveal it:

From left to right:

Control	Description
Zoom out	Zooms the graph out, showing more time.
Zoom in	Zooms the graph in, showing less time.
Share	Shares an image of the graph via Mail, Messages, AirDrop, etc. The image has the monitor name, a legend with the current values, the graph, a scale and a time axis.
History	Opens the History view for this target.
Settings	Opens the settings for this monitor in Settings → Bandwidth Monitor.