Orcylo vs Activity Monitor

Activity Monitor ships with every Mac and costs nothing, so the useful question is not which one wins. It is what Orcylo adds, what you give up if you rely on Orcylo alone, and where each one fits in a normal week.

Who should pick which

The two apps overlap less than the names suggest. Activity Monitor is a diagnostic tool that shows the present moment in detail. Orcylo is a monitor you leave running, built around apps rather than processes, with a memory of the last 30 days.

Pick Orcylo if

• You want to know which app is using memory, CPU or power, with its helper processes counted in.
• You want to look back over hours or days, not just this second.
• You want a notification when an app misbehaves instead of finding out when the fans spin up.
• You run dev servers, Claude Code or Codex and want them in the menu bar.
• You are on macOS 15 Sequoia or later. See pricing.

Stay with Activity Monitor if

• You need to sample a process, take a spindump or run system diagnostics.
• You want a free, quick look at what is using the CPU right now.
• You need per-process energy columns such as App Nap and Preventing Sleep.
• You are on a macOS older than 26.

What Activity Monitor still does better

Activity Monitor has been part of macOS for a long time, and a few of its tools have no match in Orcylo. You can check every point below by opening it from Applications > Utilities.

Sampling, spindumps and diagnostics

The More button in the toolbar offers four reports (Apple: Run system diagnostics). Sample Process is a 3-second recording of what a selected process is doing. A spindump is a report on apps that stopped responding and were force quit. System Diagnostics and Spotlight Diagnostics gather wider reports from your Mac’s logs and processes. These reports are what a developer or Apple Support asks for when an app hangs. Orcylo does not make them.

The Energy tab, process by process

The Energy tab shows each app’s Energy Impact and, on laptops, its 12 hr Power average. It also shows whether App Nap is active and whether the app is preventing sleep, plus a battery chart for the last 12 hours (Apple: View energy consumption). Orcylo shows power per app and keeps it for 30 days. It does not list App Nap or sleep assertions, so “why won’t my Mac sleep?” is still an Activity Monitor question.

Looking inside one process

Double-click any process and Activity Monitor opens an inspector with three tabs: Memory, Statistics (threads, ports, system calls and more) and Open Files and Ports (Apple: View information about processes). View > Send Signal to Process sends a signal you pick from a list, not just quit. Orcylo stays at the level of apps and their processes.

Nothing to install, nothing to pay

It is on every Mac, free, signed by Apple and updated with macOS. It refreshes every 5 seconds by default, or every second under View > Update Frequency. For a frozen app on someone else’s Mac, it is the tool that is already there.

Where Orcylo is different

One row per app, not hundreds

On our working Mac, Activity Monitor lists about 700 processes. Orcylo puts each process under the app that owns it. It uses the app’s own bundle. For command-line tools it uses the app macOS holds responsible, so node started in Terminal counts toward Terminal. System daemons fold into “macOS”. The same Mac becomes about 25 rows, each with one figure for CPU, memory, GPU, power, disk and network. The Activity Monitor glossary explains why apps spawn so many helpers.

It remembers 30 days

Activity Monitor starts counting when you open it. Orcylo records one point per minute for every metric and the busiest apps, and keeps 30 days on your Mac, so a slowdown at lunchtime can still be explained in the evening. If the Mac is slow right now, the guide on why a Mac gets slow walks through the usual causes.

It tells you

Activity Monitor waits to be opened. Orcylo sends a notification when an app burns CPU for minutes, its memory keeps growing or it writes heavily to disk. It also warns you when memory pressure turns critical or the disk is filling up. It never quits anything on its own: Quit and Force Quit always ask first.

It lives in the menu bar

Each metric can be its own menu bar item, shown as a value, a graph, both or a ring. The icon turns into a warning sign when the Mac is under strain. Developers get dev servers grouped by project with their ports, and their Claude Code and Codex limits next to the CPU figure. The feature-by-feature comparison on the homepage shows the rest.

Using both together

The two work best side by side. Leave Orcylo in the menu bar for the day-to-day: which app is heavy, what happened this afternoon, which dev server has sat idle for days. For example, when Orcylo warns that an app has burned CPU for minutes and you want to know why, open Activity Monitor, select that app’s busiest process and sample it. The sample shows the code it is stuck in, which is what you attach to a bug report.

Orcylo’s own weak spots are worth stating plainly: it is new, at version 1.0, it needs macOS 15 Sequoia or later, and it has no fan control and no per-app volume. If you need those, see how Orcylo compares with iStat Menus and the other Activity Monitor alternatives.

How we compared

We make Orcylo. Every Activity Monitor cell was checked against Apple’s Activity Monitor User Guide for macOS 26 Tahoe, and in the app itself, on October 1, 2026. Every Orcylo cell describes version 1.0. The process and app counts come from the same working Mac. If you are coming from Windows, the Task Manager for Mac guide maps each Task Manager tab to its place on a Mac.