Five days after its release, Apple's new OS X Mavericks had accumulated more usage share than the predecessor Mountain Lion did in five weeks, an ad network claimed today.Chitika said 11.8% o all Macs accessing clients' ads from the U.S. and Canada were running Mavericks five days after its launch.In 2012, OS X Mountain Lion needed five weeks to collect a 10.3% sare of all North American Macs.Other Web measurement firms have not corroborated Chitika's data. U.S.-based Net Applications, which breaks out desktop operating systems by versions, publicly discloses only monthly statistics, not daily numbers. Net Applications will issue its October data on Friday.But last year, just days after Chitika portrayed Mountain Lion's share at 10%, et Applications said its data
