Output
{"Mac OS X 10_8_2"=>624,
"osVersion=10.8.2"=>224,
"Mac OS X 10_7_5"=>186,
"Mac OS X 10_6_8"=>171,
"Mac OS X 10_8_3"=>87,
"osVersion=10.8.3"=>72,
"Mac OS X 10_5_8"=>32,
"osVersion=10.7.5"=>31,
"Mac OS X 10_7_4"=>25,
"Mac OS X 10_5_5"=>17,
"Mac OS X 10_7_3"=>8,
"Mac OS X 10_8_1"=>6,
"Mac OS X 10_6_4"=>4,
"Mac OS X 10_7_2"=>4,
"Mac OS X 10_8_0"=>2,
"osVersion=10.6.8"=>2,
"Mac OS X 10_6_7"=>2,
"Mac OS X 10_6_3"=>2,
"Mac OS X 10_4_11"=>1,
"Mac OS X 10_6_6"=>1,
"Mac OS X 10_6_5"=>1,
"Mac OS X 10_6_2"=>1}