Updating Safari
I am trying to use the iCloud beta, but I get the warning that my Safari isn't up to date. I cannot find a download for it - well, I'm new to Mac and all I can see is Safari 6.0.3 or later (OS X Mountain Lion). What is Mountain Lion? Can anyone help me figure out how to update Safari and if it's okay to update it if the link says Safari 6 (OS X Mountain Lion)???
MacBook Pro, Mac OS X (10.6.8)