Apple’s signaled that its desktop operating system is to be renamed MacOS, making the questionable search string “OS X” a thing of the past. The new brand turned up on an environmental webpage at its site (an official manifestation of hints already found in technical documents), though it was soon replaced by the currently-official name.
Of course, nothing is certain until we get our first look at Apple’s new operating systems at WWDC in June. But a branding change would make sense, especially if Apple took some time out of its opening day presentation to shine a light on the kind-of-neglected-looking Mac lineup (Macs and OS X were barely mentioned at all at the event in March or the iPhone 6S event last September).