I also had to deal with the problem that my MacBook Pro did not recognise the Tolino, regardless of which micro USB to USB-2 cable I used. But if you use the USB-C digital multiport adapter as a hub - and some people probably have one - then it works again. The system recognises the Tolino and you can synchronise with it via Calibre. The MacBook Air has two Thunderbolt/USB 4 ports that are connected via USB-C. The tolino has a micro-USB port, i.e. USB 2. This does not work directly in this combination, a translator would have to be connected in between, which some USB hubs can do, but not all