System Headroom

See what’s using your Mac. CPU, memory & local ports, grouped by app in your menu bar. Private by design. Free Direct edition. macOS 14+.

[System Headroom @systemheadroom]

Meet System Headroom: a clearer view of what’s using your Mac.

CPU, memory, and local listening ports, grouped by app in your menu bar.

Free Direct download or Mac App Store edition. macOS 14+.

https://t.co/5wSdQot2u1

[System Headroom @systemheadroom]

What’s listening on your Mac? System Headroom’s

Ports view shows local TCP and UDP listeners and the apps that own them, grouped into readable rows.

Handy when a local dev server is still running.
https://t.co/5wSdQot2u1

[System Headroom @systemheadroom]

Your Mac’s process list is your business. System

Headroom uses process samples locally. No account, analytics, or tracking. Process data isn’t collected.

A small menu bar utility with a simple job: show what’s busy and what remains.

https://t.co/5wSdQotAjz

[System Headroom @systemheadroom]

Why can memory numbers differ from Activity Monitor?
System Headroom’s Mac App Store edition labels per-app memory as RSS: resident memory. Different accounting can mean different totals.

A number should say what it measures.
https://t.co/5wSdQotAjz

[System Headroom @systemheadroom]

One app can mean a lot of helper processes. System Headroom groups them into one readable row, so you can see which app is using CPU. Expand the row when you want the details. Less process-list noise. A clearer answer. https://t.co/5wSdQot2u1