System requirement

Operating system
Windows 10 or higher
Mac OS X 10.9 (Mavericks) - macOS 12 Monterey
macOS Ventura
Google Chrome OS
Android OS 5 (Lollipop) or higher
iOS 10 or higher

Web browser
Google Chrome (most recent three versions)
Mozilla Firefox (most recent three versions)

Internet connection
Computer: 1 Mbps or better (broadband recommended)
Mobile device: 3G or better (WiFi recommended for VoIP audio)

GoToWebinar desktop app (JavaScript enabled)
GoToWebinar mobile app

2GB of RAM (minimum), 4GB or more of RAM (recommended)
Microphone and speakers (USB headset recommended)

You can test whether your system meets the necessary requirements here: