Back in OS X Lion
and then again in OS X Mountain Lion, Apple hid access to the user Library folder to prevent neophyte OS X users from messing around in the areas of the file system that could cause some damage to their Macs.
That’s fine, of course, but it took a lot of messing around in the Terminal to get that access back, and who remembers Terminal commands from last year? Not us, that’s for sure.
Luckily, Mavericks has a much easier way to turn Library access on.