iMacs usually don't overheat. If for some reason the fan fails, there is usually a thermal cutoff point where the computer will turn itself off to prevent damage (e.g fire).
It comes with all new iMacs, and costs $70 for current iMacs.
Anything a Windows PC can do and more.
1
Aluminum and glass.
iMacs start in under 8 seconds. After the loading sequence, you do not need to wait for the programs to work. Everything is ready.
Click System Preferences. Now click Display. Click Best for built-in display or click Scaled and set it to the resolution you prefer.
A combustible material can be set on fire. You can also set a frying pan on (a) fire.
I would say ice is not easily set on fire.
Yes. Any computer can get a virus.
A whole lot
The first iMac was produced in 1998.
An iPod will not catch fire by itself, but you can set an iPod on fire.