ActivityLine turns live Mac performance into a compact signal that stays visible in the menu bar. This first public update captures how the app makes system activity easier to understand without opening a full monitoring dashboard.

What’s included in this first public overview:

• Live CPU, GPU, memory, network and active-app activity presented in a single menu-bar line.
• Click controls for switching the metric being watched when a particular resource needs attention.
• Automatic switching when activity spikes, helping an unexpected slowdown surface at the right moment.
• Hover details that show which app or process is responsible for the activity on screen.
• A 24-hour free trial with no account or card required, followed by a straightforward lifetime licence.

ActivityLine is deliberately small in footprint and clear in purpose: notice what the Mac is doing, identify the likely cause and get back to work. Future entries can document refinements to metrics, alerts and the everyday menu-bar experience.