# Downloading & Installing ACARS

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In order for our customized, proprietary *Flight Data System* to function properly, it must be connected to your Sim so the data your flight generates can be transmitted to it. That transmission of data is facilitated by ACARS software.

<p class="callout info">*The term ACARS is intended to cover all Fight Tracking Software.*</p>

<table border="1" id="bkmrk-windows-%7C-pc-macos-%28" style="border-collapse: collapse; width: 100%;"><tbody><tr><td class="align-center" style="width: 50%; vertical-align: middle; background-color: grey;"><span style="color: #ffffff;">**Windows** | **PC**</span></td><td class="align-center" style="width: 50%; vertical-align: middle; background-color: grey;"><span style="color: #ffffff;">**MacOS (X-Plane Only)**</span></td></tr><tr><td class="align-center" style="width: 50%; vertical-align: middle;">**smartCARS 3**

[*click here to download and view instructions*](https://docs.walkerair.us/books/3-help/page/smartcars-3-windows-pc-mac-os-linux "smartCARS 3 |  Windows PC Mac OS Linux")

</td><td class="align-center" style="width: 50%; vertical-align: middle;">**FlightTrackerXP**

[*click here to download and view instructions*](https://docs.walkerair.us/books/3-help/page/flighttrackerxp-macos "FlightTrackerXP  |  MacOS")

</td></tr></tbody></table>

Depending on your computer's *Operating System* and the Sim you use, one of these *Flight Tracking Software* programs must be installed in order for you to fly with us.