NotchStar System tab vs Activity Monitor

System stats Published

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NotchStar is not a replacement for Activity Monitor. The System tab gives five headline readings you can see in a second. Activity Monitor is the place to go when you need to know which process is responsible and why.

What each one shows

NotchStarActivity Monitor
CPUWhole Mac, one ringPer process, history graph, per core view
MemoryActive, wired and compressed against totalApp Memory, Wired, Compressed, Cached Files, Memory Pressure graph
DiskUsed share of the startup volumeReads and writes per process
NetworkDownload and upload speed, WiFi and EthernetBytes sent and received, per process
BatteryCharge level and charging stateEnergy impact per app
Open itHover over the notchSpotlight or Applications, Utilities

What NotchStar adds for processes

The Disk tab has a Monitor section. Its Usage view lists the five busiest processes by CPU and the five using the most memory, refreshed every 3 seconds. It does not give history or per process network and energy.

Its Ports view lists programs listening on a TCP port, which Activity Monitor does not list. See the Ports list columns.

Which to use

  • A glance while you work: NotchStar. It is already in the notch.
  • A fan is loud, or the Mac is slow, and you need a name: Activity Monitor, then NotchStar’s Monitor for a quick check.
  • A server is hogging a port: NotchStar’s Ports view, which can stop it.

Apple’s page on memory in Activity Monitor explains the terms used in the table. For the NotchStar side, read the System stats feature page and what the memory gauge counts.

Quick answers.

Can NotchStar replace Activity Monitor?

No. It shows totals and a short list of the busiest processes. Activity Monitor has per process memory, energy, disk and network detail that NotchStar does not.

Keep reading.

CPU, memory, disk, battery and network
Live CPU, memory, disk, battery and network speed gauges in your Mac notch. Sampling only runs while the tab is open, so it stays light.
Disk space, duplicates, apps and cleanup
See free space, find big folders, duplicates and app leftovers, compress media and clean caches from your Mac notch. Everything goes to the Trash.
What the memory gauge in NotchStar shows
The memory ring in NotchStar counts active, wired and compressed memory against your Mac's total RAM. Cached files are not counted.
What the CPU gauge in NotchStar shows
The CPU ring in the NotchStar System tab shows how busy your whole Mac is, as a percentage, sampled once a second while the tab is open.
How to stop a process on a port with NotchStar
Press Stop on a Ports row, then press it again to confirm. NotchStar sends SIGTERM, a polite quit request, and never forces a process.

More in System stats.

What the CPU gauge in NotchStar shows
The CPU ring in the NotchStar System tab shows how busy your whole Mac is, as a percentage, sampled once a second while the tab is open.
What the memory gauge in NotchStar shows
The memory ring in NotchStar counts active, wired and compressed memory against your Mac's total RAM. Cached files are not counted.
What the disk gauge in NotchStar shows
The disk ring in the System tab shows how full your startup volume is, counting space macOS can reclaim as free, so it can differ from Terminal.
What the battery gauge in NotchStar shows
The battery ring shows charge level, turns green and reads Charging while plugged in, turns red under 20 percent. It does not show time remaining.
How NotchStar measures network speed
NotchStar shows download and upload speed in bytes per second from your WiFi and Ethernet interfaces, so VPN traffic is not counted twice.
How often NotchStar updates system stats
The System tab samples once a second, and only while it is on screen. The Monitor section in Disk samples every 3 seconds, ports about every 9.
NotchStar app icon

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