MSRX Shield

See what runs. Nothing leaves.

Only for Mac

Free

Mac

A security review that tells you what it could not see. Every finding names the evidence behind it, and the score only counts what was actually measured. MSRX Shield reviews the parts of your computer an app is allowed to read, and is honest about the rest. Most security apps answer the question "is anything wrong right now". That is the less useful question. Nearly everything on an ordinary machine is ordinary and stays ordinary — what is worth knowing is what appeared since last week. So every review is written down, and the next one is compared against it. WHAT IT LOOKS AT • Startup items — the programs that ask to run when you sign in, with the signature on each one read and reported • Protections — whether what is already built into your computer is switched on; for six of the questions a sandboxed app cannot answer alone you can hand it one named file and it answers them properly, and for the four it can never answer it says so and tells you where to look • Findings — warning signs in the places this app can reach, ranked by how strong the evidence is • Timeline — what appeared, what went away, and what stayed since your last review • Access — the protected resources this app can confirm for itself • Clipboard — off until you turn it on; when on, it checks what you copy for card numbers, keys and passwords worth not leaving lying around • Applications — everything in the shared applications folder with who signed each one, the ones carrying no signature or one identifying nobody called out first • Network — whether you are online and which interfaces are visible • A short hardening checklist, in the order the advice actually depends on WHAT IT WILL NOT DO It will not tell you it scanned your whole computer. It runs in a sandbox and most of the disk is out of reach, so every screen states what it could and could not see. A finding whose signature could not be read is reported as unreadable, never as unsigned — those are different facts, and the difference is the one most tools quietly discard. It will not invent a number. The score starts at 100 and only loses points for things that were actually observed, and the arithmetic is printed underneath it — every deduction with its count and what one of them costs, so the number can be added up by hand. Notes about the app's own limits weigh nothing, because an app that scores you lower for admitting what it cannot see has the wrong incentive. It will not raise its voice. There is no red banner, no countdown, no urgency. A tool that shouts trains you to stop listening. NOTHING LEAVES YOUR COMPUTER There is no networking code in this app at all. No analytics, no crash reporter, no account, no upload. That is a fact about the binary, not a promise in a policy — the privacy label says Data Not Collected because there is nothing there to collect with. The written summaries are produced on this computer by the on-device model, and every sentence is labelled with which system wrote it. The model is handed a decision that has already been made; it never sees a file path, and it cannot change a score. You can ask it questions in your own words, answered from those findings and never saved. Ask whether your computer is safe and it will not answer yes or no — no review of this kind supports either. Anything accusing software, or calling the computer secure, is dropped unshown. A HISTORY YOU CAN CHECK Every review is sealed with a hash of its own contents and the seal before it, so the reviews form a chain. Edit one and it stops matching its seal; remove one and the next seal points at nothing. Export the log and anyone with a hash function can recompute the whole chain without this app. Sealing proves the record was not altered by something else on your machine — it is not offered as proof of anything about this app itself, and the log says so in its own text. You can export a review to a file you choose. It carries finding names, the paths they are about, and counts — nothing from your clipboard and no file contents. Previously released as OrionShield. Same app, new name.

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Version 2.0 — rebuilt. Previously released as OrionShield. Same app, new name. REVIEWS ARE NOW COMPARED, NOT REPLACED Every review is kept, and the Timeline screen shows what appeared, what went away, and what stayed since the last one. Startup items that arrived since you last looked are called out on their own. FINDINGS THAT SAY WHAT THEY KNOW A program whose signature could not be read is now reported as unreadable rather than as unsigned. Version 1 called those unsigned at high severity, which was a false alarm on files it simply was not allowed to open. A SCORE THAT ONLY COUNTS WHAT WAS MEASURED Notes about the app's own limits used to count against your score, which meant honesty made your machine look worse. They now weigh nothing. The dashboard also shows how the score was reached — every deduction, its count and its cost — so you never have to take the number on faith. A PROTECTIONS SCREEN THAT ADMITS ITS OWN LIMITS Thirteen questions people expect a security app to answer about the protections already built into a computer. Three can be answered from inside a sandbox with no permission at all. Six more are held in two files, and the screen offers to answer those if you hand it one named file at a time — it names the file, reads it, never writes it, refuses anything else you pick by mistake, and the access ends when you quit. The remaining four cannot be answered on any terms, and the screen says so with the reason and where to check yourself. Every one of those answers was established by running the shipped app, not by assuming. AN APPLICATIONS LIST THAT SAYS WHO SIGNED WHAT Every application in the shared folder, with the developer team that signed it — and the ones carrying no signature, or a signature identifying nobody, listed first. A signature says who took responsibility for a binary, never whether the binary is good, and the screen says so rather than implying otherwise. A TAMPER-EVIDENT REVIEW LOG Reviews are sealed into a hash chain. The Timeline screen verifies it on sight and tells you if a review was edited or removed, and the log can be exported for somebody else to recompute. AN ASSISTANT YOU CAN ASK The summary of your last review is written for you as before, and you can now ask questions about it in your own words. Answered on this computer from the findings already on screen, never saved, never sent. Ask whether your computer is safe and it will not answer yes or no — no review of this kind can support either, so that question is answered in writing rather than by the model. Anything it writes that accuses software, manufactures urgency or declares the computer secure is dropped rather than shown, and you are told it was dropped. COMMAND-K Every screen and every action from one field. A HARDENING CHECKLIST The short list of things that actually help, in order, with your progress kept. The app cannot verify these and says so — the marks are yours. EXPORT Write a review to a file you choose. It carries finding names, paths and counts, and nothing from your clipboard. AN ITEM IN THE MENU BAR Optional. Shows the score and what changed without opening the window. REBUILT THROUGHOUT New interface in light and dark, both measured for contrast. Signature checks are cached and run off the main thread, so the window keeps drawing while a review runs. The clipboard watcher now wakes only when the clipboard actually changes.

The developer, Mrinal Singh Raja, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Seller
    Mrinal Singh Raja
    Size
    2.5 MB
    Category
    Utilities
    Compatibility
    Requires macOS 26.0 or later.
    • Mac
      Requires macOS 26.0 or later.
    Languages
    English
    Age Rating
    4+
    Copyright
    © 2026 Mrinal Singh Raja