---
title: "F3X (Mac)" #
lang: en
permalink: /f3x-(mac).html
---

This is an add-on section for checking your SD card for errors using F3X.
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Depending on the size of your SD card and the speed of your computer, this process can take up to several hours!
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This page is for Mac users only. If you are not on Mac, check out the [H2testw (windows)](h2testw-(windows)) or [F3 (Linux)](f3-(linux)) pages.
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#### What you need

* The latest release of [F3X](https://github.com/insidegui/F3X/releases/latest)

#### Instructions

1. Unzip the F3X `.zip` file
1. Insert your SD card into your computer
1. Run the F3X app
1. Select your SD card
1. Press "Start Test"
1. Wait until the process is complete.

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If the test shows the result `Success! Your card is ok!` your SD card is good and you can delete all `.h2w` files on your SD card
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If the test shows any other results, your SD card may be corrupted or damaged and you may have to replace it!
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Return to [Get Started](get-started)
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