Privacy
Nothing leaves your Mac.
Mac Deficit collects no data about you, your Mac or your files. This page says exactly what the app, this site and a purchase each involve.
The app
Mac Deficit reads the names and sizes of the files and folders you ask it to scan. All of that stays on your Mac, in the app's memory while it is open.
- No account. There is nothing to sign in to.
- No analytics, telemetry or advertising. The app does not report what you scan, what you remove, how you use it, or that you opened it.
- What it keeps, it keeps on your Mac: your settings, the folders you scanned lately, and a history of what you moved to the Trash, deleted or put back. You can clear the recent scans and the history in the app.
- Crash reports stay with you. If the app stops unexpectedly, it says so the next time it opens and shows you the report. The app's own reports name none of your files. A report written by macOS is macOS's own and may name your user folder; the app tells you which is which. Nothing is sent unless you choose to send it to us yourself.
The one time the app uses the network
When you choose Mac Deficit › Check for Updates…, the app reads one small file from this site, macdeficit.com/version.json, which holds the newest version's number. It does this only when you choose it, never on its own.
The request carries no cookie and nothing that identifies you, your Mac, your version of the app or of macOS. As with any request on the internet, the server receiving it sees the IP address it came from and the time. The version of the app sold on the Mac App Store has no such menu item: the App Store updates it.
This site
- No cookies, and nothing stored in your browser.
- Nothing loaded from anyone else: no fonts, scripts, trackers or embedded content from other companies. Every file on these pages comes from this server.
- The server's log. Like any web server, ours records each request: the IP address, the time, the page asked for and the browser's description of itself. We use it to keep the site running and to count visits and downloads. It is not shared or sold, and not joined with anything else.
Buying the app
The direct download is sold through a payment provider that acts as the seller of record: it takes the payment, handles tax, and delivers the download. It is named at checkout, and its own privacy policy covers what it collects to do that, such as your email address and payment details. We never see your card. We receive what is needed to stand behind a purchase: the email address you gave and the order.
A purchase from the Mac App Store is between you and Apple; we receive no information that identifies you.
If you write to us
Write to support@macdeficit.com and we will have your email address and whatever you choose to tell us. We use it to answer you, and for nothing else. Questions and bug reports are also welcome on GitHub, where what you post is public. Please look through a crash report before sharing one, and leave out anything you would rather keep to yourself.
Changes
If any of this changes, this page will say so, with the date. The app will not begin to collect anything without a new version that says so plainly.
Last updated 14 November 2026 · RawData Studio