Your download should start automatically. Follow the steps below to get set up.
Double-click the downloaded file to mount it. Drag RPCleaner into the Applications folder, then launch it.
RPCleaner needs Accessibility permission to protect your wallets. Click Open System Settings to continue.
Find RPCleaner in the list and flip the toggle. You may need to enter your password or use Touch ID to confirm.
RPCleaner is now active. It will scan your browsers for wallet extensions and guard your RPC connections in real time.
macOS may block RPCleaner the first time. Click Done, then go to System Settings > Privacy & Security.
Scroll down to the Security section. You will see "RPCleaner" was blocked. Click Open Anyway and confirm.