To upgrade OS X or not?
I have a 4 yo MacBook with Mac OS X Lion 10.7.5 (11G63). I need to upgrade Safari 6.1.6 but don't know if I should. I keep reading that there are problems with the newest version of the OS X. What is your experience? I haven't added any software other than Turbo Tax and a few unimportant apps.
What are the risks of upgrading? How much will it cost?
Any help/advice will be appreciated. Thanks in advance.
MacBook, Mac OS X (10.7.5)