The issue focused on cloud computing with servers running Linux (mostly Debian based), although some OS X machines also fit into this category. Other servers running OS X include Ubuntu (probably Linux based), FreeBSD and Solaris (Solaris probably Linux based). Mac machines include OS X machines running OS X Lion (probably OS X based), Snow Leopard (probably OS X based), Mavericks (probably OS X based), Yosemite (probably OS X based), Mountain Lion (probably OS X based), Mavericks again (probably OS X based),