# Installing

## Download <a href="#download" id="download"></a>

Download the latest stable release from the [releases page](https://github.com/pietrop/subtitlesComposer-app/releases). Check out the release description to see what has changed from the previous version.

* download the `dmg` file
* open it/mount it on your mac/finder
* drag the app into the applications folder
  * First time you open it, right click on the app and click open, to avoid the `unidentified developer` error message. From then on, you can double click.
* add it to the dock if you want a shortcut to it.

{% hint style="warning" %}
For the app to work, you have to install a third party open source dependency called Aeneas, see below.
{% endhint %}

## Extra dependency: Aeneas

[Aeneas](https://github.com/readbeyond/aeneas) is an open source tool that is used by this app under the hood to do the alignment.

**In order to use the app you need to install Aeneas on your computer.**

You can install it for [mac os x by downloading the `dmg` from this link](https://github.com/sillsdev/aeneas-installer/releases).

![Aeneas in app link ](https://1327109202-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LKMj8j4KNeE8zwPNhFS%2F-LKMjiSA380bj7we4VTB%2F-LKMjjEBXjzFWyUNGOZ5%2Fintro-aeneas-notice.png?generation=1534775459260266\&alt=media)

At a very high level under the hood Aeneas converts the text of the provided transcription into speech (`TTS`) and compares the waveform with the one of the original media (audio or video) to do the alignment.