Compidextrous 

One who is fluent in using MAC and Windows computers.

Lily has no problem working on any computer, Mac or Windows, since she is compidextrous.

Frank can easily work on a Mac or Windows operating system, he's compidextrous.

I need to hire a compidextrous person for this graphic design position.

Compidextrous by LILY NEBEL March 22, 2017

Compudextrous 

Able to use differing operating systems equally well.

The ability to seamlessly move between keyboard layouts and OSs.

"I use a Mac at home and PC at work, I keep typing @ instead of quotes"
"I'm compudextrous so not an issue"

Compudextrous by Aka_85 October 5, 2021

cumbidextrous 

When someone can masturbate using both hands

I'm cumbidextrous

cumbidextrous by Stoopidassname March 6, 2022