Love to code for macOS, not so much for iOS. Love the new language Swift, the best language I ever used and I have used (and still use) a few of them: C, C++, Objective-C, PHP, Applescript, HTML, CSS, Javascript, you name it. Swift is the most expressive language and you can do so much without many lines of code. I am now diving into the world of computer graphics, in particular learning how to use the power of the Metal programming framework.