Mnemosyne OS
New The documentation explains every engine, step by step. docs.mnemosyne-os.io →

Download · free

Install Mnemosyne OS.

The full memory OS runs on your machine. You download it, you launch it. There is no account, and no mandatory server. Pick your system below, and the link hands you the latest installer.

Version v1.9.1 · Release notes ↗ · Public repo

The files live on our public releases. The button starts the download directly, without passing through a GitHub page. There is nothing to install on a server, and no account to create.

Verify your download

These SHA-512 checksums come from the manifests published with the release. The in-app updater checks a download against those same files. If the digest you compute differs, do not run the file.

Mnemosyne-OS-Infinity-1.9.1-Setup-x64.exe
7b533c353f675b465d3b99f2dbe67cc86b4c27f70fd27dcb2ab4171e479994f313ea28c8172427df0da864f0303064114e86f782c254967c383dc9ed362affb7 Compare with certutil -hashfile "Mnemosyne-OS-Infinity-1.9.1-Setup-x64.exe" SHA512
Mnemosyne-OS-Infinity-1.9.1-mac-arm64.dmg
84c1c723748fcf5117292f2234044c652a9b6e0f3513facccf359b388d2fbe4ea8d11d1a54d2c3d41f5f3c869f650c13790e68e6ff275a365d3195af212f174b Compare with shasum -a 512 "Mnemosyne-OS-Infinity-1.9.1-mac-arm64.dmg"
Mnemosyne-OS-Infinity-1.9.1-x86_64.AppImage
ad0cdc226de74d09c773ed3f12a7f75e71bb2d2c8f1604308169281ed139adde7bd61caac4e9b3100c3900d33452b7f91bf5035ff038a916532fe94d289d1bcd Compare with sha512sum "Mnemosyne-OS-Infinity-1.9.1-x86_64.AppImage"
Mnemosyne-OS-Infinity-1.9.1-amd64.deb
5cfa084556549f50db43e3083e2857f2f4edc9a73b4821b574e6ddc61d055d55925f82715bd6049f0779dd169803c9dbf0b5cf6c8259c7969331559f5229ecb9 Compare with sha512sum "Mnemosyne-OS-Infinity-1.9.1-amd64.deb"

Languages

Mnemosyne OS speaks seven languages.

Pick yours in Settings. German, Portuguese, Russian and Chinese are in beta: corrections from native speakers are welcome.

  • English
  • Français
  • Español
  • Deutsch beta
  • Português beta
  • Русский beta
  • 中文 beta

The first five minutes

Four screens, and your memory answers.

What you will see right after installing. The app opens without an account.

  1. 01 "+ New Vault" A name, a type. The vault exists. It is a file on your disk.
  2. 02 "Feed it now?" The app offers a folder to watch. Its files enter memory, and the app re-reads them whenever they change.
  3. 03 Sources The vault's watched folders. "Add a folder to watch…", or rescan.
  4. 04 Settings The "RAG attention" dial, the sources, the kinds of memory. You tune all of it whenever you want.

The full walkthrough, with these screens: Your first vault ↗

System requirements

Will it run on your machine?

The app itself is light. The models you choose to run decide the rest. Cloud models stay light. A full local stack wants memory and disk.

Memory · RAM

8 GB minimum

runs in reduced mode: cloud models, lighter local features.

32 GB recommended

comfortable with local models running on your machine.

Disk · free space

200 MB light end

cloud mode, hardly any local models.

30 GB heavy end

full local stack: LLM, voice and vision models on disk.

Processor · platforms

Windows

x64 (Intel / AMD) · Windows 10 or 11.

macOS

Apple Silicon only (M1 or later). Intel Macs are not supported.

Linux

x86-64 (Intel / AMD). No ARM build (Raspberry Pi, etc.).

You pick which models to download, from Settings. That choice alone decides where you land between the two ends.

Install & trust

Windows is signed. The first launch takes one step.

The Windows installer is code-signed: Certum certificate, verified publisher "TONY TROCHET", RFC-3161 timestamped. On macOS, Apple notarization is on its way (ad-hoc signed meanwhile). A warning may still appear on the first launch. One step clears it.

Windows · SmartScreen

The installer is signed. A fresh certificate still has to earn its SmartScreen reputation, so "Windows protected your PC" may appear. Click More info, then Run anyway. The warning goes away as downloads accumulate.

macOS · Gatekeeper

Our Apple Developer account is waiting for approval (Apple, if you're reading this: we're waiting for you 🙏). Until then, macOS blocks the app on its first launch. Open System Settings → Privacy & Security, scroll to the bottom and click Open Anyway. You'll need to do this again after each update, until the approval comes. If it still blocks, open Terminal and run:

xattr -dr com.apple.quarantine "/Applications/Mnemosyne OS.app"

Sign up to hear when the approved Mac version is out:

Linux · AppImage

Make the AppImage executable, then run it. The .deb package installs normally. Linux runs no signature check.

chmod +x Mnemosyne*.AppImage