Live USB Topology

• Reads the macOS device tree notifications in real time
• Auto-refreshes on connect and disconnect with fun visual effects
• Spatial layout with hosts, hubs, and devices by bus hierarchy
• Mac port labels mapped to physical locations (Left, Right, etc.)
• Smooth spring-physics animation when the topology changes
• Manual refresh anytime with Cmd+R

Speed-Coded Connections

• Connection thickness scales with USB speed tier
• Seven tiers from USB 1.0 (1.5 Mbps) to Thunderbolt 3 (40 Gbps)
• Dashed lines for low-speed USB 1.0 connections
• Speed labels shown at cable midpoint or destination node

Inspector Panel

• Dedicated sidebar listing every detected issue
• Connection Throttling and Device Speed Cap warnings
• USB Power Budget analysis for usage, mismatched, and oversubscription
• Bandwidth Oversubscription detection when child devices exceed parent capacity
• No Free Ports alert when all hub ports are occupied
• Deep Hub Chain detection for USB 2/3/4+ tier chains
• USB 2 Transaction Translator contention warnings
• Issue severity colour-coded red, orange, and yellow
• Ignore individual issues with persistent tracking
• One-click Search Fix opens a targeted web search

Throttle Detection

• Red cables when a device is limited by its upstream connection path
• Orange highlights for device-reported speed caps
• Port capability difference highlighting when a faster root port is available
• Throttling insights in device popover with upgrade suggestions

Interactive Canvas

• Pinch-to-zoom and scroll across the full topology
• Zoom presets from 10% to 100% (Cmd+1 through Cmd+7)
• Cmd+0 fits the canvas to the window
• Incremental zoom with Cmd+Plus and Cmd+Minus
• Zoom and viewport state persists between sessions

Device Details

• Click any node for a popover with full hardware info
• Vendor ID, product ID, speed, serial number, power draw, and more
• Inline editing of device name and manufacturer
• Eject disk-based USB devices directly from the popover
• Copy all device info to clipboard
• Look up devices on DeviceHunt, EveryMac, or Web
• Link to System Information for the host Mac

Search

• Real-time search across names, manufacturers, and nicknames
• Match counter showing current and total results
• Find Next / Find Previous navigation (Cmd+G)
• Matching nodes scrolled into view and highlighted

Hot-Plug Effects

• Golden glow animation on new connections
• Dust cloud animation when devices disconnect
• Sound effects on connect and disconnect (Pebble, Bottle, or Pop)
• Smooth spring animation as topology reflows

Hub Port Visualisation

• Port number and position shown on hub nodes
• Empty port indicator dots (toggleable)
• Port numbering display (toggleable)
• Smart port ordering to minimise visual cable crossings

Canvas Export

• Export the full topology as PNG or PDF
• All nodes, cables, and speed labels included
• Ready to print or share

Device Nicknames

• Custom nicknames assignable from device popover
• Multiple name sources with priority: edited, probed, USB IDs, DeviceHunt
• Colour coding to distinguish each name source
• Nicknames persist across launches by vendor+product+serial
• Manage and remove from the app menu

Online Enhanced

• Download the Linux USB IDs database for richer vendor and product names
• Toggle database usage on or off
• DeviceHunt integration for online name lookups
• Colour coding to distinguish online-sourced names

Display Options

• Show or hide kind labels (Computer, Host, Hub, Device)
• Toggle speed label placement (midpoint vs. destination)
• Show or hide empty port dots and port numbers
• Free port spacers for unused hub ports
• Per-column width sizing for nodes
• On-canvas legend with all speed tiers and warning indicators (Cmd+K)
• Status bar with last refresh timestamp (Cmd+/)

Optimised

• Only 1.30 MB app download size
• Only 100 MB base memory footprint

Comparison