Before you start
Have your private Nimzo subscription and a working internet connection ready.
Know your macOS version. Happ’s App Store distribution and desktop DMG have different system requirements and can present different controls.
Your subscription URL is a credential. Anyone who receives it may be able to use your access. Keep it out of screenshots, public chats, browser searches and shared clipboard history. If exposed, ask Nimzo support to replace it.
Based on official client documentation. Controls and operating-system prompts can differ between versions.
Choose the Mac distribution that fits your system
Use the official Happ hub to reach the macOS App Store listing or universal DMG. Check the requirements for the specific distribution; do not treat them as interchangeable.
Follow the installation instructions supplied by the official source. If macOS warns about the download or its publisher, stop and verify the source. This guide does not require bypassing Gatekeeper, disabling security checks or running commands from a download mirror.
Source: Happ system requirements
Import your Nimzo subscription
Open the private setup message supplied by Nimzo. If it offers an import link for Happ, open that link and confirm that Happ is the receiving app. Otherwise, copy the complete subscription URL, switch directly to Happ and use its subscription or clipboard import control.
Happ documents clipboard, QR and deep-link imports. Use only the method actually supplied by Nimzo; do not build a deep link yourself or paste the URL into a third-party link converter. After import, confirm that a server list appears. Control names and placement vary by client version.
Source: Happ import documentation
Review permissions and routing
Select a supplied Nimzo server and start the connection. If macOS requests a VPN configuration, network extension or related permission, approve only a request that follows your action in the trusted Happ installation.
Inspect the mode available in your distribution. Proxy routing can cover only applications that use that proxy; exclusions and direct routes can leave other traffic on your normal connection. A device tunnel has a different scope. Do not assume that the App Store and DMG builds behave identically.
Verify browser and application traffic
Record your public IP with Happ disconnected, connect and repeat in a fresh tab. Check the application you plan to use separately. Follow the IP, DNS and IPv6 checklist before relying on the configuration.
Repeat after sleep/wake and after changing from Wi-Fi to another network. If a managed Mac prevents permission changes, contact its administrator rather than removing a company profile.
Finish with a check
A connected badge is only the beginning.
Compare your public IP, inspect DNS results and check IPv6 separately before relying on the setup.
Check your VPN connection →Troubleshooting
The app will not open on this Mac
Compare your macOS version with the requirements of the distribution you selected. Return to the official download hub instead of searching for an unofficial patched package. App Store availability can also depend on your region.
Source: Happ system requirements
Connected badge, but an app uses the old IP
Review whether that app uses the configured proxy, whether a direct-route rule applies and which mode your Happ distribution offers. Test with other VPN clients disconnected. Share the mode and app name with support, not your private URL.
Connection fails after sleep
Check that ordinary internet access has returned, disconnect and reconnect Happ, then repeat the checks. If failure persists, record the macOS version, Happ distribution and network type so support can distinguish an import problem from a network or permission problem.
Need help with access or service rules? Read the Nimzo FAQ. P2P and torrents are not supported.
Need Nimzo access?
Get your subscription first, then return to the guide for your device.