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You should get something like this:
Your USB stick appears as a new device in the list. Check
that its size corresponds to the size of your USB stick.
To install <span class="application">balenaEtcher</span>, drag the <span class="application">balenaEtcher</span> icon onto the <span class="guilabel">Applications</span> icon.
[[!toggleable id="dd" text="""
The installation is complete once the command prompt reappeared.
Take note of the *device name* of your USB stick. In this example, the USB stick is 8.0 GB and its device name is <span class="code">/dev/disk1</span>. Yours might be different.
<span class="command-placeholder">tails.img</span> with the path to the USB image
<span class="command-placeholder">device</span> with the device name found in step 6
Replace:
Plug your USB stick in the computer.
<p>If you get an <span class="guilabel">invalid number ‘16m’</span> error, try
using <code>16M</code> instead:</p>
<p class="upgrade">In the following steps, you will install an intermediary Tails using the Tails USB
image that you downloaded earlier.</p>
<p class="pre command">sudo dd if=<span class="command-placeholder">tails.img</span> of=<span class="command-placeholder">device</span> bs=16m && sync</p>
<p class="pre command-output">/dev/disk0
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme &lowast;500.1 GB disk0
1: EFI 209.7 MB disk0s1
2: Apple_HFS MacDrive 250.0 GB disk0s2
3: EFI 134.1 GB disk0s3
4: Microsoft Basic Data BOOTCAMP 115.5 GB disk0s4
/dev/disk1
#: TYPE NAME SIZE IDENTIFIER
0: FDisk_partition_scheme *8.0 GB disk1
1: Apple_HFS Untitled 1 8.0 GB disk1s1</p>
<p class="pre command-output">/dev/disk0
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *500.1 GB disk0
1: EFI 209.7 MB disk0s1
2: Apple_HFS MacDrive 250.0 GB disk0s2
3: EFI 134.1 GB disk0s3
4: Microsoft Basic Data BOOTCAMP 115.5 GB disk0s4</p>
<p class="pre command-example">dd if=/Users/me/tails-amd64-3.12.img of=/dev/rdisk9 bs=16m && sync</p>
<p class="pre command">diskutil unmountDisk <span class="command-placeholder">device</span></p>
<p class="pre command">diskutil list</p>
<p class="pre command">dd if=<span class="command-placeholder">tails.img</span> of=<span class="command-placeholder">device</span> bs=16M && sync</p>
<p class="pre command">dd if=<span class="command-placeholder">tails.img</span> of=<span class="command-placeholder">device</span> bs=16m && sync</p>