https://devzone.nordicsemi.com/f/nordic-q-a/125909/failure-to-connect-register-dongle-using-macair---latest-osProblem originally due to installation and failure of Gas Smart meter - a common problem in the UK with up to 4+million similar customers. Issue is Smart meters on external walls unable to communicate with indoor Hub. Solution - use a zigbee extenderen-USTelligent Community 13Mon, 01 Dec 2025 09:43:18 GMThttps://devzone.nordicsemi.com/thread/555834?ContentTypeID=1Mon, 01 Dec 2025 09:43:18 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9523a11c-1c1d-4794-87ac-c03bc7d17f79&#216;yvind<p>Hello,&nbsp;</p> <p>Are you following steps provided under&nbsp;<a href="https://wiki.makerdiary.com/nrf52840-mdk-usb-dongle/programming/">nRF52840 MDK USB Dongle - Programming Guide</a>?&nbsp;</p> <p>Kind regards,<br />Øyvind</p><div style="clear:both;"></div>