Three minutes from download to done.

M On a Mac

1. Download the installer.

   Download for Apple Silicon (M1/M2/M3/M4) →

   Download for Intel Mac →

   Not sure which Mac you have? Click the Apple menu → About This Mac. If the chip line says "Apple M1/M2/M3/M4," pick the Apple Silicon download. If it says "Intel," pick the other one. Pick wrong and the app won't launch -- harmless, just download the other.

2. Open the DMG. Double-click the file in your Downloads folder. A small window opens with the Mr. Mags icon and a shortcut to your Applications folder.
3. Drag Mr. Mags into Applications. Just like installing any other Mac app.
4. First launch: clear the one-time warning.

   Mac blocks unsigned apps the first time. For most Macs it’s one right-click:

   • In Applications, right-click Mr. Mags (or Control-click) → Open.
   • Click Open in the dialog. Done — double-click works forever after.
   On macOS 15 Sequoia, or right-click didn’t work? Two more ways

   Privacy & Security. Double-click Mr. Mags, click Done on the block, then open System Settings → Privacy & Security, scroll down, find “‘Mr. Mags’ was blocked,” and click Open Anyway (enter your password, then Open Anyway once more).

   Terminal — most reliable, every macOS version. Open Terminal (⌘ Space, type Terminal, Enter) and paste:

   xattr -d com.apple.quarantine "/Applications/Mr. Mags.app"

   Then double-click — it opens with no warning. (That just removes the download “quarantine” flag; the app is unchanged.)

5. Mr. Mags introduces himself — click Got it, and the window opens with a cheat sheet + memory browser.
6. If you use Claude Desktop: quit and reopen it.

   Mr. Mags exposes memory_save / memory_recall / memory_search tools to Claude Desktop via MCP. If Claude Desktop was running, quit it (⌘Q) and reopen so it picks up the new tools.

   Recall in Claude Desktop is rock-solid. For the most dependable capture across every AI, add the browser extension too — it catches facts automatically as you type.

Where the memory file lives: ~/Library/Application Support/Mr. Mags/brain/ No Mr. Mags account, no Mr. Mags cloud, no Mr. Mags telemetry. We don’t collect it because we don’t have a place to collect it to. Your conversations still go to your AI and only your AI — when auto-inject adds a remembered fact to your message, that goes to the same AI you were already talking to, never to us.

Next: install the browser extension → so auto-capture works on claude.ai, ChatGPT, Gemini, Mistral, and Meta AI — with eight more AI sites along for the ride.

W On Windows

1. Download the installer.

   Download Mr-Mags-Setup.exe →

2. Run the installer. Double-click Mr-Mags-Setup.exe in your Downloads.
3. The SmartScreen warning — this is the part to read.

   Windows will pop up a blue window: "Microsoft Defender SmartScreen prevented an unrecognized app from starting."

   Click the small "More info" link. The window expands. Click the "Run anyway" button that appears.

   Why? The installer is code-signed as Mediagato LLC (since v2.2.1), but SmartScreen also weighs how many machines have seen a certificate before — a new signature earns that reputation download by download. If the blue window appears, check the publisher line says Mediagato LLC, then "Run anyway" is the right button. Expect this step to disappear on its own as the count climbs.

4. Step through the installer — "just me" is fine, accept the defaults, Install, Finish.
5. Mr. Mags introduces himself — click Got it, and the window opens with a cheat sheet + memory browser.
6. If you use Claude Desktop: quit and reopen it.

   Mr. Mags exposes memory_save / memory_recall / memory_search tools to Claude Desktop via MCP. If Claude Desktop was running, fully exit (right-click the Claude tray icon → Quit) and reopen so it picks up the new tools.

   Recall in Claude Desktop is rock-solid. For the most dependable capture across every AI, add the browser extension too — it catches facts automatically as you type.

Where the memory file lives: %APPDATA%\Mr. Mags\brain\ No Mr. Mags account, no Mr. Mags cloud, no Mr. Mags telemetry. We don’t collect it because we don’t have a place to collect it to. Your conversations still go to your AI and only your AI — when auto-inject adds a remembered fact to your message, that goes to the same AI you were already talking to, never to us.

Next: install the browser extension → so auto-capture works on claude.ai, ChatGPT, Gemini, Mistral, and Meta AI — with eight more AI sites along for the ride.

Q Quick install (Windows)

Three sub-paths, same end state. All three end with the desktop app sitting in your system tray. Sub-paths B and C also set up the browser extension in one go.

Path A — Setup.exe default — visual installer

• Download Mr-Mags-Setup.exe →
• Double-click. On the SmartScreen warning, click More info → Run anyway.
• Step through the installer. Click Finish. Mr. Mags opens. Done.
• After this, install the browser extension separately (use the Browser extension only card up top) if you want auto-capture on claude.ai, ChatGPT, Gemini, Mistral and Meta AI — it also loads on eight more AI sites.

Path B — PowerShell one-liner faster, if you're comfortable

• Open PowerShell. (Search "PowerShell" in the Start menu, or on Windows 11 right-click Start → Terminal.)
• Paste this line and press Enter:

irm https://cdn.mrmags.org/install.ps1 | iex

• About 60 seconds. Installs the desktop app silently (no admin needed), extracts the browser extension to a known path, and opens Chrome to the extensions page with the path already on your clipboard — paste into Load unpacked, click Select Folder, done.
• Want to read it before you run it? View install.ps1. Plain-text PowerShell, ~9 KB. Same script Path C downloads at runtime. No hidden installer.

Path C — Mr-Mags-Quick-Install.cmd back-compat — one file double-click

• Download Mr-Mags-Quick-Install.cmd →
• Right-click the .cmd → Properties → check Unblock → OK. Then double-click. Click More info → Run anyway on the SmartScreen warning. The same 60-second installer from Path B runs.
• The .cmd is a 1.2 KB wrapper that fetches the same install.ps1 from the CDN and runs it — identical end result to Path B. If your machine has Defender ASR's "Block obfuscated scripts" rule enabled, it may still refuse the .cmd; if Path C fails with "Access is denied," use Path A or Path B.

B Browser extension

Auto-capture tuned for claude.ai, ChatGPT, Gemini, Mistral, and Meta AI; the extension also loads on Perplexity, Copilot, Grok, DeepSeek, Google AI Studio, Poe, T3 Chat, and Qwen — plus any custom server. Type a save-worthy fact, hit Enter, and it's saved to your machine before the AI sees it.

First: the Mr. Mags desktop app must be installed and running — the extension talks to your local brain at 127.0.0.1:11436.

1. Download & unzip — mrmags-extension.zip →, unzip it anywhere you'll remember.
2. Open chrome://extensions (Edge: edge://extensions; Brave: same as Chrome).
3. Flip on Developer mode — the toggle, top-right.
4. Click "Load unpacked" and pick the unzipped folder (the one with manifest.json in it).
5. Pin it — puzzle-piece icon, top-right → pin Mr. Mags to your toolbar.

Test it: open claude.ai, watch for the Mr. Mags pill bottom-right (green dot = connected to your brain), and type "My student Sam has a 504 accommodation for extended time on tests." Hit Enter — a "Memory saved" toast confirms the save.