In the App Store updates tab, it usually has a prominent display offering me to upgrade to Mavericks. (I'm still on Mountain Lion). Today, that display area is blank. It all points to Yosemite being launched at the Apple event in later this week.
Correction: my original post said "Mavericks" is being launched. That was a typo error.
Correction: my original post said "Mavericks" is being launched. That was a typo error.
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