Mac Audio Sync · Last Updated: May 22, 2026
Mac Audio Sync does not collect, transmit, or store any personal information. The application runs entirely on your Mac, communicates with no servers operated by AGM Apps, and contains no analytics, telemetry, advertising, or crash reporting. Your data never leaves your device.
Mac Audio Sync does not collect or process any of the following:
To do its job — synchronizing audio output across multiple devices — Mac Audio Sync interacts with macOS in the following ways. All of this happens locally on your Mac, with no data leaving the device:
The app enumerates the audio output devices connected to your Mac (built-in speakers, external displays, USB DACs, etc.) using Apple's standard Core Audio APIs. This is necessary so you can select which devices to sync. No information about your devices is transmitted off your Mac.
When you enable synchronization, the app routes the system audio stream to your selected output devices in parallel. The audio passes through Core Audio buffers only and is never inspected, recorded, or stored.
Your settings (selected devices, volume levels, launch-at-login preference, menu bar behavior) are saved to your Mac's local user preferences using Apple's UserDefaults system. These preferences stay on your device.
If you enable "Launch at Login" from the menu bar dropdown, macOS registers Mac Audio Sync as a login item using Apple's SMAppService API. You can disable this at any time, either inside the app or from System Settings > General > Login Items.
Mac Audio Sync does not make outbound network connections. It does not "phone home," check for updates over the network, or fetch remote configuration. The only way to receive a new version is by downloading a newer installer manually from agmapps.net.
Mac Audio Sync contains no third-party advertising SDKs, no analytics SDKs, no crash reporting SDKs, and no social-media SDKs. It is built using only Apple's first-party frameworks (Swift, SwiftUI, AppKit, Core Audio, ServiceManagement). There are no partners with whom we could share data, because there is no data.
Mac Audio Sync is distributed as a signed and notarized .dmg installer from agmapps.net. Apple notarization is an automated security check; it does not transmit personal information about you to AGM Apps. When you first launch the app, macOS Gatekeeper may communicate with Apple to verify the developer signature — this is a standard macOS security feature controlled by Apple, not by AGM Apps.
Mac Audio Sync does not request access to your Camera, Microphone, Photos, Files, Contacts, Calendar, Location, or any other protected resource. It uses only the standard Core Audio interfaces available to all macOS applications, which require no special permission prompts.
Mac Audio Sync is a general-purpose audio utility. It does not collect data from anyone, including children under 13.
If future versions of Mac Audio Sync ever change what data is processed (for example, if we add an optional opt-in update checker), this Privacy Policy will be updated, and the "Last Updated" date above will be revised. We will never change behavior in a way that contradicts the no-data-collection commitments in this policy without a clear version-note and updated policy.
If you have questions about how Mac Audio Sync handles (or doesn't handle) your data, please reach out:
help.agmapps@outlook.com