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It supports the NDI ecosystem for transporting video, audio and related metadata over IP networks. This package is a supporting library, not the complete NDI Tools suite, a standalone video editor or a graphical streaming control application.\n\n## Who needs it\nInstall it when a trusted NDI-enabled application or plug-in explicitly requires the shared NDI runtime. Production, streaming and media workflows may rely on it to send or receive NDI streams, but the host application's implementation determines which NDI functions and formats are available. Installing the library alone does not create a usable sender, receiver, virtual camera or routing interface.\n\n## Installation and compatibility\nThe official Mac download is `libNDI_for_Mac.pkg`. Open the publisher's installer and follow its instructions, or use `brew install --cask libndi`. The cask installs the package and identifies its installer receipt as `com.newtek.libndi`. Its own metadata specifies `\u002Fusr\u002Flocal\u002Flib` and root authorization. A system-level package installation can require administrator authorization; do not run an untrusted installer merely because a plug-in asks for a missing dependency.\n\nThe checked cask specifies macOS but no numeric minimum. The official installer identifies itself as NDI Redistributable 6.3.2.0.260413 and supports arm64 and x86_64 installation hosts. This confirms the installer targets Apple silicon and Intel Macs; it does not independently prove every bundled library is Universal. Verify compatibility with the exact host application and its documented runtime requirements before upgrading. The numeric identifier above comes from this downloaded package's own metadata, not from a separate SDK announcement.\n\n## Dependencies and permissions\nA compatible host application and the relevant NDI workflow are external requirements. For network transport, sender and receiver need appropriate network connectivity, discovery and firewall configuration. Host applications may require macOS Local Network or other permissions for their own functions. The library itself does not establish a blanket Camera, Microphone, Accessibility or Full Disk Access requirement; grant only permissions actually needed by the software using it.\n\nNo additional Homebrew formula dependency or named cask conflict is declared. Runtime replacement or removal can affect every application that loads the shared library, so check all dependent plug-ins and applications before changing it.\n\n## Licensing, accounts and network behavior\nThe runtime is provided through the official NDI download server. It is part of the licensed NDI SDK ecosystem and is not established as an unrestricted open-source library. Review the applicable NDI SDK license, redistribution obligations and the host application's own terms. Basic and advanced SDK offerings have different capabilities and licensing; downloading this runtime does not imply entitlement to every advanced feature.\n\nThe library package does not describe a required personal account for local runtime use. SDK access, host software and other NDI services can have separate account or commercial requirements. Downloading uses the internet; media transport uses the configured network. Do not assume a local network is private merely because the media never passes through a public streaming service.\n\n## Operational cautions\nVideo and audio may contain confidential material. Control which applications can publish or receive streams, restrict network exposure, and validate routing before a live production. Network capacity, discovery, host configuration and format support affect performance; a runtime install is not a guarantee of low latency or interoperability with every sender. 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