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Download 2.34 for macOS

macOS 14 or later · Apple silicon11.9 MB

How to install

A native app for Apple silicon Macs

Apple M4 Pro · 14 cores · 48 GB · sample

A clearer view of your Mac.

l/Activity shows what your Mac is doing right now, remembers what it did earlier, and helps you free up space without guessing.

Download 2.34 for macOSSee what is inside

macOS 14 or later · Apple silicon11.9 MBHow to install

CPU24%User 17.6% · System 6.4%
Memory21.4 GBof 48 GB · pressure Normal
Power14.2 WCPU 9.6 · GPU 4.2 · ANE 0.42 W
GPU18%Renderer 16% · Tiler 9%
Neural Engine0.42 Wpower, not utilization
10:31:0696.8%Mac CPU · Lumen Edit was the largest workload
Now10:42:18Mac CPU 24%
30 minutes back10:12:20kept sample by sample
Movies148.2 GB
Pictures86.4 GB
Developer62.8 GB
Library58.9 GB
Disk3.2 MB/sRead 2.1 · Write 1.1 MB/s
Keep Awakeuntil 11:42Staying awake
CPU24%
GPU18%
RAM21.4GiB
↓1.6MB/s↑210KB/s
PWR14.2W
TEMP54°C

01MonitorCPU and GPU

Know what your Mac is doing, in one sentence.

Every page opens with a plain sentence built from the reading on screen, then shows the instrument behind it. Overview draws your chip the way it is built: a cell for every core, the GPU, the Neural Engine and the memory they share.

  • From a spike to the app behind it in two clicks.
  • Per core, per app and per process, with GPU time, disk and network beside CPU.
  • A dash when there is no reading. Never a made-up zero.
Explore Monitor

This is how the app shows itOverview

02InvestigateTime, as depth

Go back to the moment it happened.

Most monitors only show the present. l/Activity keeps the last minutes sample by sample, a year of summaries, and recordings you can replay. So you can still find the cause after the fan has gone quiet.

  • Rewind the last minutes and see which app was busy, even if it has quit since.
  • Record with ⇧⌘R, then set before beside after.
  • Be told when load stays high, with a link to that exact moment.
Explore Investigate

This is how the app shows itHistory

03Files & AppsStorage

Find what is filling your disk. Remove it without guessing.

Storage measures your disk once and keeps the result. The Space Map shows where the gigabytes are. Cleanup suggests caches, logs and build folders, and nothing is ticked until you tick it.

  • Every removal shows the exact paths first.
  • Move to Trash is the default. l/Activity never empties the Trash.
  • A receipt for every cleanup, including what failed.
Explore Files & Apps

This is how the app shows itStorage · Space Map

04This MacBoard edge

The small jobs, done properly.

Live readings in your menu bar. A switch that keeps your Mac awake and tells you why it stopped. Volume for a single app. A tidy menu bar. A read of your Mac’s protections.

  • Keep Awake from one minute to seven days, with stops for battery and heat.
  • A menu bar organizer that hides what you rarely use.
  • Mac Care reads your protection settings and changes nothing.
Explore This Mac

This is how the app shows itKeep Awake

05What is inside

One window instead of a folder of utilities.

A system monitor, a disk space map, a cleaner, an uninstaller, a keep-awake switch and more, each usually a separate app. Here they share one window and one way of working.

  • Monitor3 tools

    System monitor

    CPU, GPU, Neural Engine, memory, disk and network, live.

  • Process manager

    Every app with its helpers. Quit, pause and inspect.

  • Menu bar readings

    The numbers you choose, always in view.

  • Investigate3 tools

    History

    Rewind the last minutes. Keep a year of summaries.

  • Session recorder

    Record, replay and compare before with after.

  • Diagnostics and alerts

    Told when something stays busy.

  • Files & Apps5 tools

    Disk space map

    See where the gigabytes went.

  • Safe cleanup

    Caches, logs and build folders, reviewed first.

  • File finder

    Any file by name, at once.

  • Duplicate finder

    Identical files, verified by content.

  • App uninstaller

    The app and what it left behind.

  • This Mac4 tools

    Keep Awake

    For as long as you say, with safety stops.

  • Menu bar organizer

    Tuck away the icons you rarely use.

  • App volume

    Turn one app down, not everything.

  • Protection check

    Are your Mac’s defences switched on?

15 tools4 groups, as in the sidebarOne window

06Why people keep it open

Built to be trusted with your Mac.

An app that watches everything and can remove files has to behave. These are the rules l/Activity is built on. The line under each one is a line from the app.

  1. It speaks plainly

    Every page starts with a sentence built from what it measured. The numbers are underneath for when you want them.

    A line from the appLumen Edit is the busiest workload on this Mac.

  2. It remembers

    Live history, a year of summaries and recordings you can replay. You can ask what happened at 10:31, not only what is happening now.

    A line from the appInspecting a historical sample · 10:31:06

  3. It does not invent numbers

    When macOS gives no reading you see a dash, and estimates are called estimates. Sleep and pauses stay gaps on every chart.

    A line from the appPaused, asleep or missing time is never filled in.

  4. It asks before it removes

    One review for every tool, with the exact paths in full. Move to Trash is the default and there is a receipt afterwards.

    A line from the app3 items ready · 5.2 GB in saved scan

  5. It stays on your Mac

    No account and no telemetry. Readings, scans and recordings are files in one folder that you can open.

    A line from the appl/Activity does not send telemetry or install a background helper.

  6. It is light on its feet

    A native app and a 12 MB download. When its window is hidden it stops drawing, and you choose how often it measures.

    A line from the appEconomy · Every 5 seconds

07Guides

Learn it by doing.

20 short guides, each with numbered steps, the real names of the buttons and the screen you should be looking at.

  1. Step 1. Open Cleanup

    In Storage (⇧⌘D), click Cleanup in the title bar. The left column lists places that are usually safe to clear, with the size each held in your last scan: user caches, logs, temporary files, Xcode and package manager caches, project build folders and more.

  2. Step 3. Tick what you want gone

    Nothing is ticked for you. Tick rows one by one, or use Select Shown. Each row gives the name, the full path and the size. Your choices are kept in the basket bar at the bottom while you move between categories.

  3. Step 5. Read the exact paths

    The review lists every path that will be touched, in full, with its size. A folder means everything inside it. If you selected something l/Activity will not remove, such as your Documents folder, it is shown with a lock and the reason, and left out.

  4. Step 6. Move them to the Trash

    Click Move to Trash. The items go to the Trash through Finder, so you can put them back. macOS may ask once whether l/Activity may control Finder, and for a password if an item needs one.

    Delete Permanently sits in its own red frame. It skips the Trash and cannot be undone. It is never the default and never remembered.

More guides

All 20 guides

08FAQ

Fair questions.

All 67 questions and answers
Which Macs can run l/Activity?

Any Mac with Apple silicon (M1 or later) running macOS 14 or later. Intel Macs are not supported, and the app does not run under Rosetta.

One tool asks for a little more: App Volume needs macOS 14.2.

Does l/Activity send my data anywhere?

No. There is no telemetry and no account. Your readings, history, recordings, scans and receipts stay in the app's folder on your Mac.

The app itself contacts lslash.app for two things only: signed updates and the signed version check. The privacy page lists every connection.

Will l/Activity delete anything automatically?

No. Nothing is ever selected for you, and every removal, from every tool, passes through the same review that lists the exact paths. You press the button.

Why does an app show more than 100% CPU?

There are two scales, and l/Activity labels both.

The Mac as a whole runs from 0 to 100%. An app is measured per core: 100% is one core kept fully busy. An app using three cores reads about 300%. Wherever you see an app figure, the words 100% = one core are nearby.

How far back can I look?
  • The last 120 seconds on Overview, by pointing at the timeline.
  • The last 5, 10 or 30 minutes in full detail in History.
  • Up to a year of summaries for the Mac as a whole. Thirty days are kept by default.
  • Up to a year per app, if you turn on saved app history.
  • As long as you like, in full detail, with a recording.

Look back at what happened earlier shows each one.

Can I use it offline?

Yes. Each successful version check allows up to seven days without a connection. The app checks again when it starts, when the Mac wakes and every few hours, so on a Mac that is usually online you never notice.

Settings → General → l/Activity updates shows the date your offline time runs until, with a button to check right now.

09Version 2.3411.9 MB

Get l/Activity

A native app for Apple silicon Macs. No account, nothing to set up.

Download 2.34 for macOSInstalling and updating

macOS 14 or later · Apple silicon11.9 MB

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