Blockr is a native macOS firewall app that lets you monitor and control outbound connections from your Mac by holding each new app connection and asking whether to allow or block it. It operates fully on your device without uploading data, offering per-app and per-host rules, a live connection log, and privacy-focused features such as temporary rules and no traffic inspection. The app is free for personal use, supports macOS 14 and later, and is designed for minimal intrusion with one-time approval for its network filter system extension.
