OpenNOW

OpenNOW is a native macOS cloud gaming client built with AppKit, Objective-C++, and WebRTC. It provides a desktop-first interface for signing in, browsing games, and launching cloud streams.

Features

• Native AppKit UI with browser-based OAuth sign-in
• Persistent sessions and account switching
• Catalog browsing, library view, and game launch flow
• Native WebRTC streaming with audio/video/input controls
• Stream preferences for region, codec, bitrate, and recovery

Requirements

• macOS with AppKit/Cocoa support
• clang++ with C++20 and Objective-C ARC support
• cmake for building Sentry Native
• Apple Command Line Tools or Xcode toolchain
• WebRTC.framework or WebRTC.xcframework in third_party/webrtc-official

Sentry Native

Install the latest Sentry Native release before building with crash reporting enabled:

scripts/install-sentry-native.sh

The installer writes the SDK to third_party/sentry-native/install. To send a one-time verification message during launch, run with OPN_SENTRY_VERIFY=1.

Build & Run

make
make run

Build artifacts are written to build/OpenNOW.

make run enables OPN_INFO_LOGS=1 by default so runtime logs are printed in the terminal. To watch logs from another terminal while the app is running, use:

make logs

The live log target tails the captured runtime log at ${TMPDIR:-/tmp/}OpenNOW/OpenNOW-current.log.

Clean

make clean

Repository Layout

• src/main.mm - app entry point
• src/OPNAppDelegate.* - app lifecycle and navigation
• src/auth/ - OAuth and session handling
• src/games/ - catalog, library, and launch logic
• src/streaming/ - WebRTC stream session and UI
• src/views/ - native AppKit views
• src/common/ - shared types and helpers
• assets/ - artwork and icons

Vendor Parity

• docs/vendor-functional-parity.md tracks native OpenNOW behavior against the vendored GeForce NOW web app and records telemetry/feedback/PWA/Tizen surfaces as intentional non-goals.

Contributing

Open issues for bugs or feature requests and submit pull requests for improvements.