For the average person what really is the point of the activity monitor app when all you really want to know is whether your mac is running at its best?

Question

I have had my imac for nearly 18 months now,
It's okay, is the best I can say about it.
It cost me around £800+
So recently (and foolishly!) I downloaded OS Mavericks when I was actually looking for a freebie word processor programme (I got Bean because it's simple like me.)
Now the point of all this is that Mavericks has new features like a redesigned Safari (But I ain't noticed any difference yet) and Imaps (Huh!) and Ibooks and Imovie or something.
So when you are oldish like me, you really don't want people to keep changing and introducing new stuff (most of which is pointless anyway) all the time; because it takes us old ***** a while to get used to the last "improvement."
So you try and get rid of all these new apps that you don't want and didn't ask for anyway,
and then you find out you can't, because they're an integral part of the new OS.
Brilliant!
Then you find that Mail has to redo itself and this thing no longer works properly etc. and you start wishing you hadn't got up that morning...
So you try and get it all back the way it was..
And you can't.
Because you don't have an external hard drive to use the Time machine back up facility.
So you get in touch with Apple Support and it's now nearly bedtime, but at least you feel like you might be gettin' somewhere.
You talk to the supportguy and suddenly you can't remember what the problem is and what your name is, and you're thinking you might as well order in a pizza seein' as you've drunk the last of the gin..."
Anyway the guy manages to keep his temper and you get some degree of order restored but the machine still seems "jumpy" so someone says to you
"Check out the Activity Monitor! That'll tell you if something's not working right."
So you do, but it doesn't.
Just a bunch of numbers and CPU stuff and User Idiot Input etc.
All you really want is some little box to pop up and say,
"Hey! yyyou've really ssscrewed things upppp-p here, old mmmmman!!. This programme is no longer functioning properly, that thing appears to frozen, and you just wiped half your saved photos of Aunt Jessie's 94th birthday celebration (the one's where she had her eyes open)..
Press here for a full maintenance overview and repair menu.."
By this time you are on the floor, your leg's got cramp and you really really need a pee.
But there ain't no maintenance programme, just an activity monitor app you can't make any sense out of, so you yank the **** power cord out of the socket and go to bed..
So you try and

Answer 1

DVD-R media that is single layer has 4.3 GB formatted capacity.
DVD+R DL media has 7.8 GB formatted capacity.
DVD-R double sided has 4.3 GB on each side.
Message was edited by: a brody