See what slowed down your Mac.

Ebb records your Mac's activity. Drag the time ring to find the process behind a slowdown.

Try the time ringRelease info

For macOS 13 or later

Rewind a workday

Pick a time to see what was happening.

Sample data. Open Settings in the window to change appearance.

Go back to the 60 seconds before the slowdown

The fans spin up, the cursor stutters. Press ⌃⌥E and Ebb replays the last 60 seconds: which process, at which second, and how much. No need to keep a monitor open and wait for it to happen again.

⌃⌥E
Sample replay: a spike caused by a build
  1. 42 s agomds_stores18%
  2. 31 s agoXcode340%
  3. 12 s agoXcode612%

Xcode was building and kept every performance core busy for about 40 seconds. It will settle down when the build finishes.

From the day to the details

Rewind in Overview, then open a module for a closer look at a live reading.

Overview

Overview shows the whole day

  • A 24-hour ring you can drag back to any moment.
  • Every busy stretch comes with a sentence: who, why and whether to act.
  • After a few days it tells you when something is “3× busier than usual.”
  • Runaway processes are marked on the ring where they happened.

CPU

CPU blooms like a flower

Every core is a petal, with performance and efficiency cores shown separately.

Details
  • The thermal state tells you when your Mac starts throttling.
  • Processes sorted by load; open one for details or to end it.
  • Common system processes come with a note on what they do and what to try.

GPU

GPU as a honeycomb

Overall load as a honeycomb that lights up as it gets busier.

Details
  • A graph of the last 60 seconds.
  • macOS doesn't share per-app GPU use, so Ebb doesn't make it up.

Memory

Memory is a pool of bubbles

Every app is a bubble sized by the memory it uses.

Details
  • Memory pressure shown directly, no math needed.
  • When memory is tight, Ebb lists the apps most worth quitting, one click each.

Disk

Disk on a platter

Live read and write speeds.

Details
  • Free space on every volume.
  • It looks but never deletes. Cleanup and disk analysis are for dedicated tools.

Network

Network as a star map

Upload and download speeds, and traffic per app.

Details
  • Listening ports and the process holding each one, with the ones open to your network marked.
  • Common ports come with a note; hover over a row to end its process.

Energy

Energy grows in rings

One turn shows 60 seconds of power use, with each bar broken down by app.

Details
  • Whole-Mac power on Macs with a battery.
  • Energy use by app, plus whatever is keeping your Mac awake.

For everyday use

Menu bar panel
A mini ring, four readings, today's load strip and the top processes. Battery levels for supported Bluetooth accessories, too.
Slow down in the background
Set a rule for an app: when you switch away it drops to background priority or pauses, and resumes the moment you're back.
A Dock icon with a tide
The water in the Dock icon rises with CPU usage, and the icon turns warm when the processor is busy.
Light and dark appearance
Choose light or dark, or follow macOS. Each module keeps its own tint.
Automatic update checks
Ebb shows a notice when a new version is available and asks before installing.
Your data stays local
History lives in a database on your Mac. No account required. You decide how long to keep the history.

What Ebb doesn't do

Other tools already do these well, so Ebb leaves them alone: cleaning caches and uninstalling apps, analyzing disk space, blocking apps from the network, limiting battery charge, and controlling fans.

Pay once, keep it

Try it free first and buy it if it earns its place. No subscription.

$5per license
  • A ring of the whole day, ready to rewind
  • ⌃⌥E replays the last 60 seconds
  • Runaway processes and your usual baseline
  • Slow down or pause apps in the background
  • A full menu bar panel
  • Your data stays on your Mac

Questions

How is Ebb different from Activity Monitor?

Activity Monitor shows you numbers for right now. Ebb records the whole day so you can look back at what happened, and explains in a sentence who it was, whether it's normal and whether to act.

Does Ebb need administrator access?

No. Ebb only reads what macOS makes available to regular users. That's also why processes owned by root, such as WindowServer, don't appear in the process list.

Will running Ebb slow my Mac down?

Ebb samples once a second and uses very few resources itself. Heavier reads, like the port list, only happen while that page is open.

Why are there gaps in the ring?

Ebb has no record of time when it wasn't running. It starts recording the first time you open it and never guesses about the past.

Can it show temperatures and fan speed?

No. Both need interfaces Apple doesn't make public. Ebb uses the system's public thermal state to tell you when your Mac is throttling.

Which Macs are supported?

macOS 13 or later, on Apple silicon or Intel. Whole-Mac power is only available on Macs with a battery.