OS X on new iMac HDD
I am taking my iMac to a local non-Apple shop to replace the HDD. I am guessing it will not have a system on it. I have a time machine backup, however the new HDD will be 2TB instead of 3 because the iMac will be given to my wife. She has her own time machine backup but it is for her old and dead 2008 iMac.
So I am just wondering: can we simply connect her Time Machine backup to an iMac with a completely empty HDD or do we need to install a system first? And if so, how?
Cheers
Waddo