Lion shipped in July 2011, cost $29.99 and was the first to be distributed through the Mac App Store.
Apple also updated Safari 6 and Safari 7, which run on Mountain Lion and Mavericks, fixing nine flaws in the browser. Apple bumped up the designation of Safari 6 to v. 6.2, and because the patches were listed as affecting only Mountain Lion (Mavericks runs Safari 7, which was updated to v. 7.1), Lion may have also just seen the last Safari bug repairs.
Relatively few Mac owners run Lion on their machines: At the end of August, just 9% of all Macs were powered by OS X 10.7, according to metrics vendor Net Applications. The majority by a big margin — 64% — ran Mavericks.
Mavericks' successor, OS X 10.10 (aka Yosemite), will launch Oct. 21. The free upgrade can be applied not only to all Mavericks Macs, but also most of those running Mountain Lion and Lion.
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