MacMemory — See what's eating your Mac's storage

Storage Cleaner for macOS

See what's eating your Mac's storage.

Open the grey “System Data” block, read what every item is in plain language, and delete what you don’t need. One screen. No subscription.

Download for macOSOne-time purchase
  • System Data explained
  • Safe delete
  • Before and after
  • Nothing in background
  • Local first
  • macOS 14+

Scroll to clean a Mac

The review screen, cleaning a Mac

System Data
System Data288 GB974,5 GB of 994,7 GB used222 GB free after
System Data stays 86 GBFreed by your selection
App cachesTemporary files apps keep to open faster. They rebuild themselves.Safe to delete96,0 GB
Old iPhone and iPad backupsFull copies of devices, often ones you no longer own.You decide38,0 GB
Time Machine snapshotsLocal copies macOS keeps between backups. It makes new ones anyway.Safe to delete62,0 GB
TrashFiles you already deleted.Safe to delete21,4 GB
Mail downloadsAttachments Mail saved a second copy of.Safe to delete18,4 GB
Keep scrolling. Nothing is deleted until you click.Free up 202 GB

Scroll: this is the whole app, start to finish.

Real screenshot from the founder’s MacBook
macOS storage settings showing a 288 GB System Data block

Apple won’t say what the grey part is.

Deleting photos doesn’t touch it. Emptying the Trash doesn’t touch it. Restarting doesn’t touch it. It only shrinks when something deletes what’s inside.

It isn’t just your Mac

Posts from people staring at the same grey block. None of them is about this app.

The maker’s own post

Five clicks. That’s the app.

Open, allow access, free up, pay, done. Nothing to configure, nothing running in the background.

Overview

Your disk, the way System Settings shows it — then one card pointing at the grey block.

OverviewMacintosh HDRescan
Macintosh HD974,5 GB of 994,7 GB used20,2 GB free
  • Documents 269 GB
  • Applications 118 GB
  • Other users 9,4 GB
  • Photos 269 GB
  • Messages 21,8 GB
  • System Data 288 GB
System Data is 288 GB.Here is what’s inside it.Open System Data

System Data

Every category, one plain sentence each, and a bar that shows what your selection frees before you pay.

System Data288 GB of 994,7 GBRescan
Selected to free up202 GBFree after222 GBnow 20,2 GB
System Data stays 86 GBFreed by your selection
App cachesTemporary files apps keep to open faster. They rebuild themselves.Safe to delete96,0 GB
Time Machine snapshotsLocal copies macOS keeps between backups. It makes new ones anyway.Safe to delete62,0 GB
TrashFiles you already deleted.Safe to delete21,4 GB
Old iPhone and iPad backupsFull copies of devices, often ones you no longer own.You decide38,0 GB
Nothing is deleted until you click.Free up 202 GB$19 once, 1 Mac

Done

One number, before and after. Then you close it.

DoneResultRescan
202 GB freedSystem Data is now 86 GB
Before
After
222 GB free. You can close MacMemory now.DoneShow in Finder
Interface in progress. Screens shown are design mockups of the app being built.

Everything you need
to get the space back

Built for people who don’t know what a cache is and don’t want to.

Opens the grey block

Every item inside System Data gets a size and one line a non-technical person can understand. No file paths, no jargon.

System Data288 GB
App cachesTemporary files apps keep to open faster.
96,0 GB
Old iPhone and iPad backupsFull copies of devices, often ones you no longer own.
38,0 GB
Time Machine snapshotsLocal copies macOS keeps between backups.
62,0 GB

Tells you what is safe

Green means delete it, nothing breaks. Yellow means it’s yours to decide. There is no red, because MacMemory never shows you anything dangerous.

App cachesRebuilds itself. Nothing breaks.
Safe to delete
iPhone backup, Oct 2023You may still want this one.
You decide
Time Machine snapshotsmacOS makes new ones anyway.
Safe to delete

Finds what nothing uses any more

System Settings shows how much space things take. It can’t tell you whether anything still needs them. MacMemory asks the tool that owns each one: Docker knows which images no container uses, Steam knows when you last played a game, and an old project’s own files say when you last worked on it.

Every row says how it knows, and where there is no evidence there is no row. None of them is ticked for you. Docker removes its own images rather than moving them to the Trash, and the row says so. Volumes, where databases live, are never listed.

Docker images nothing usesExample
postgres 15No container uses it.
You decide
Untagged imageLeft over from a rebuild. No container uses it.
You decide
Build cacheNo build is using it. The next build rebuilds what it needs.
You decide
Before
20 GB free
After
20 GB free

Shows the result on Apple’s own bar

The same storage bar you see in System Settings, before and after. You watch the grey block shrink and the free space come back.

What’s inside System Data

The things macOS lumps into one grey block, and MacMemory pulls apart.

The full answer, with the steps to free each of these up by hand: What is System Data on a Mac?

One price.
Lifetime access.

One-time payment. No subscription. Buy once at the early price and download it straight away.

$19$29

  • One-time payment
  • 14-day money-back guarantee
  • Lifetime updates included
  • Native macOS app, works offline
  • 1 Mac license
Download for macOS

1 Mac, $19, one-time payment.

Secure checkout by Creem, powered by Stripe. Prices in USD, excluding VAT and may vary by location.

Frequently Asked
Questions

Is it safe?
MacMemory only deletes files macOS can regenerate, or files you explicitly confirm. It never touches your documents, photos, or apps.
Is MacMemory a subscription?
No. You pay once and own it, including future updates.
Does it run in the background?
No. You open it, you clean, you close it. No menu bar icon, no login item. MacMemory never uploads your files or file names, and connects to the internet only to check your license and for updates.
Is "memory" the same as storage?
Technically no. Memory is RAM, storage is your disk. But when a Mac says the disk is almost full, most people call it running out of memory, so that’s the name.
Which Macs does it work on?
Any Mac on macOS 14 Sonoma or later, Apple silicon or Intel.
How do I get the app after buying?
You get an email at the address you paid with, containing the download link and your license key, within a minute of checkout.
Is there a money-back guarantee?
Yes. 14 days from the day you buy, no questions asked. Email hello@macmemory.app and you get a full refund.

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