For the first time since Chrome OS was launched, devices running Google's operating system have outsold Apple's Macs in the US in the first quarter of this year. The data comes from IDC, though an exact number for Chrome OS device sales hasn't been given. That said, Mac OS computer sales are estimated to be around 1.76 million for Q1 2016, so Chrome OS device makers have probably sold almost 2 million units during the same time frame. IDC notes however that most of those Chrome OS sales have gone to schools, where they are apparently very popular. Chromebook laptops, Chromebase...
Source: http://www.gsmarena.com/chrome_os_devices_have_outsold_macs_in_the_us_for_the_first_time_ever-news-18316.php