I can validate this directly as we operate the largest library of long-form professional/technical content library on the web. Over 700k professionals per month are registering and downloading content specific to their needs.
Below is the current breakout of their device factor for 2020:
Windows = 97.26% Mac = 8.21% Linux 2.92% Chrome OS = 0.27%
Clearly just one perspective into the market but we've never seen Mac approach any level of critical mass within the US professional marketplace.