Hot swap HDDS -at least the mac pro has easy to get to HDD bays
The minis these days make it very easy to get to HDD and RAM. You just unscrew a large cap on the bottom.
Nope, gotta remove the logic board to get the HDD out of there. Nice try though.
and I have awful vision.
Perhaps there's a reason for that.
A friend of mine has am iMac from 2001 running the latest OSX.
No, no he doesn't. The latest OSX will not run on such a computer. Its not a matter of speed, either. The newest OSX does not have support for the PowerPC architecture.
Going the speed of light is bad for your age.