Tons of commercial R&D experience using C++/ I'm a retired engineer who used to work in R&D in the UK and Europe for 3 decades.
I have zero knowledge of Macs, but specialise in C++ on WIndows and Linux, and embedded platforms.
If you need help, send me a message first.
Once I take a look at the project that needs building and have a chat with you, I will confirm further interest.
Cheers
Mai