The Meridian products with USB maintenance ports are basically integrated USB/Serial converters.

These will require the FTDI virtual com port drivers from the FTDI website.

Any device not having USB maintenance port I recommend a FTDI chipset based USB/Serial adaptor. I use to recommend Prolific based chipset devices as they were typically more prolific (excuse the pun) but I discovered compatibility of certain (earlier?) prolific chipset devices were a problem with some versions of OSX.

Just watch out with some OEM Windows. I recently went boot am and in the end went full retail as I needed to be sure that, apparently as is happening with some OEM kit, the WindOws license is not suddenly rescinded.

Meridian owner since 1992
Prime & PSU, Focal Elear headphones, Roon (ROCK 8Gi5 NUC), Explorer 1 & 2, F80. 200/203, various Sonos (via Roon).