Mac browser market share in last year, from Wikipedia

mac-browser-share.rb

#!/usr/bin/env ruby
require 'csv'
require 'open-uri'

url = "https://analytics.wikimedia.org/datasets/periodic/reports/metrics/browser/all_sites_by_os_and_browser.tsv"
csv = CSV.new(open(url), col_sep: "\t", headers: true)

cutoff = Date.today.prev_year
counts = {}
counts.default = 0
csv.each do |r|
  next unless r['os_family'] == 'Mac OS X'
  next unless Date.parse(r['date']) > cutoff
  counts[r['browser_family']] += r['view_count'].to_i
end

total = counts.values.reduce(:+).to_f
counts.sort_by { |k,v| -v }.each do |k,v|
  puts "%-15s  %5.1f" % [k, 100 * v / total]
end

Results

Safari            47.5
Chrome            40.6
Firefox            8.9
AppleMail          2.6
Other              0.3
PhantomJS          0.0
Camino             0.0
WebKit Nightly     0.0