I've just purchased the Lightroom Tether Pro for Fuji XT-2 camera but mistakenly purchased the Windows version rather than the Mac version which I need.
Does anyone know how I can switch versions?
Or is there a phone number to reach anyone from Adobe?
This plugin is developed and sold by Fujifilm, so you'll have to contact them: Tethered Capture Plug-in for Adobe® Photoshop® Lightroom® (Windows 10 / 8 / 8.1 / 7 SP1, Mac OS X 10.7-10.11 / macOS Sie… . But it appears that the Mac version is no longer available, so you might have to ask them for a refund.
You should contact Fuji to find out. It is made by Fuji and only sold through the Adobe Add-On website.
Looking at that web site it doesn't appear there is a Mac version. At least I can't find it.