According to the Financial Times, Google has decided to stop using Windows computers because of security concerns. The company began this change in January, following an incident where Google's computers in China were hacked, and it seems that the more than 10,000 employees of the company will be making the change.
One employee is quoted as having said, “Many people have been moved away from [Windows] PCs, mostly towards Mac OS, following the China hacking attacks.” While it's not clear how many of these employees are moving to Macs, the Financial Times states that "New hires are now given the option of using Apple’s Mac computers or PCs running the Linux operating system." However, it is just as likely that Google will be inciting its employees to use its own Chrome operating system, which will be released soon.
Google employees do get to choose which OS they use, however, unlike what is the norm in most companies. As one employee said, “It would have made more people upset if they banned Macs rather than Windows."