Here are the two new USB driver files that Steve Forbes provided needed , just download them both from OneDrive onto your Mac (e.g. The secret to getting Macs to recognise the new devices and upgraded old devices is to replace the USB connection library files for this application. Here's the issue then - hook up a device with the latest Windows 10 Mobile OS and you're left at the 'Connect your phone' page, the Mac just doesn't see the device anymore: Note that this is currently showing as not available in some regions - anyone know of a reliable non-Store source/disk-image? In the meantime, I've archived the application and its contents here - comments welcome below on whether this works?)
(Windows Phone is the ex-Nokia, then-Microsoft official utility for syncing with Macs here in the App Store.