Because they
want to make money?
I must be very thick today, so you'll need to explain. Said vendors
already supply both OS X and Windows versions to all purchasers.
Which is actually used is entirely up to the customer.
While I'm sure it is possible to make money in Linux software, I
can tell you from personal experience that there is a strong
perception that "all things Linux should be free" - I sold cross
development tools for many years (still do actually), and I've
been asked about Linix versions many times - I don't think I ever
was asked if I'd sell Linux tools, or what they would cost etc...
But many times I got asked "how about free versions for Linux?"
... I never developed linux versions of my tools.
Regards,
Dave
--
dave06a (at) Dave Dunfield
dunfield (dot) Firmware development services & tools:
www.dunfield.com
com Collector of vintage computing equipment:
http://www.classiccmp.org/dunfield/index.html