Oh that’s such a weird limitation.
In the early 2000’s open source hubris, next year was always the year of the Linux desktop. Since then consumer windows matured into a totally ok OS and one with the best support for graphics and C++ development at that.
Non-windows support nowadays is a fairly strong signal of a non-serious software offering if there is no obvious reason for it. And that’s totally fine, hobby tools developed by enthusiasts rock - but they are not industrial in scope as such.
Twitter ran primarily OSX (for devs) and Linux (for servers).
You've already got context, know the stack, whatever.
They might be happy to have a known contributor solve some problem or project for them.