There are two downloads, both on the Downloads page. In Sessionwire it's the download icon in the left sidebar, and anyone can open it at studio.sessionwire.io/download, with or without an account.
You can host and join Sessions in a supported browser without installing anything. The app gives you a dedicated window that doesn't depend on your browser.
You and your Guest both need the app if you plan to use Remote Desktop Control with them. It doesn't work in a browser.
Install the Plugin Suite if you want to send audio from your DAW into a Session, or record someone else's audio in your DAW.
Guests don't need an account for this. If a Host wants to hear your DAW, download the plugins from studio.sessionwire.io/download, install them for free, and put the Send plugin on your main output. Guests who only listen and talk don't need them.

Download the build that matches your Mac. The Intel build still opens on an Apple Silicon Mac, but it causes serious lag and audio problems. This is one of the most common issues we see.
To check which Mac you have, open the Apple menu > About This Mac. If it lists an Apple M chip (M1, M2, M3 or later), you have Apple Silicon. If it lists an Intel processor, you have an Intel Mac.
On macOS 27, install Rosetta 2 before you use the plugins. See macOS Golden Gate.
Smart App Control can block the Sessionwire installer even though it's signed. If it does, right-click Setup.exe, choose Properties, tick Unblock, and run it again. Or turn Smart App Control off.
Some antivirus software flags the Sessionwire installer by mistake. If yours does, allow it and run the installer again.
In Sessionwire, open the HQ Audio and Talkback menus in your Studio. You should see four Sessionwire devices: Sessionwire Send Plugin, Sessionwire Receive Plugin, Sessionwire Talkback Send Plugin and Sessionwire Talkback Receive Plugin.
On a Mac you can also open Audio MIDI Setup (Applications > Utilities), where the same drivers are listed as ToSW, FromSW, ToSWTalkback and FromSWTalkback.
macOS loads audio drivers from one folder, and one broken driver in it can stop the rest from loading.
/Library/Audio/Plug-Ins/HAL and press Return.On macOS 27, missing drivers usually mean Rosetta 2 isn't installed.
Another program has taken over the Sessionwire audio device.
Still stuck? Email support@sessionwire.com with your computer, operating system and DAW, and what you see.