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You can try to uninstall the USB stick again using *Disk Utility* from the beginning of this page.
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<p>If you are not sure about the device, stop proceeding.</p>
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Formatting the USB stick using the command line
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To reset the USB stick, select the **Erase** button in the top middle.
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</div>
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<p>If you are not sure about which device to choose, stop proceeding.</p>
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<p>You might overwrite any hard disk on the computer.</p>
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<div class="caution">
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In the list of storage devices, verify that the device corresponds to the USB stick that you want to uninstall, its brand, its size, etc.
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Plug in the USB stick that you want to uninstall.
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Make sure that the USB stick that you want to uninstall is unplugged.
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Start on macOS.
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[[!inline pages="doc/first_steps/uninstall.intro" raw="yes" sort="age"]]
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[[!meta title="Uninstalling Tails using macOS"]]
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Open the **Terminal** utility from **Applications&nbsp;▸ Utilities**.
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You can try to reset the USB stick again using *Disk Utility* from the beginning of this page.
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b. If there is an **Erase**
button on the top middle, click on it.
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a. If there is an **Erase** tab
in the right pane, click on it and then click on the **Erase**
button on the bottom right
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In the confirmation dialog, click on the **Erase** button to confirm.
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Start *Disk Utility*.
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