I'm getting too old to care what platform (language, framework) other people prefer, but I suspect that if you were to go to any given web development conference, empirical evidence would not square with OS X being "unsuitable" for web development. Beyond that, I suspect you could web development done on pretty much any desktop OS these days. I'm sure you could do web development on Chrome OS, if you wanted to.<p>This strikes me more as "This is different than what I'm used to!" or "I don't much care for this." than "This is unsuitable." Emacs is available on OS X. Beyond the initial server configuration, I'd say the large majority of packages your average web developer is installing are from NPM, RubyGems, CPAN, etc.