 The latest OSX update (Mavericks[1]) was free, and I've been
running an OS that's three years behind, and I have a vague
recollection that there was software that was only available for
more recent versions of OSX. So I went ahead and updated.  [1]
"To install OSX Mavericks, say 'Siri, I feel the need for
speed.'"  Good things: the update went smoothly. Nominally
better battery life. I can finally disable Spellcheck on a
system-wide level. I guess iBooks on the laptop is a good thing.
Not so much irritating as mildly baffling: whenever I close an
app, rather than popping up whatever app was next in the task-
switcher, as you'd expect, Finder opens. I got nothing. Seems to
have fixed itself, probably when I updated the keyboard hack.
Decidedly non-minor: trackpad scrolling is less responsive than
it used to be and my hacked Delete key (formerly the worthless
Eject key) doesn't work about half the time. [Fixed that one by
updating the hack.] Also Firefox will frequently decide to stop
loading web pages altoge