Replacing hard drive on my iMac
Good morning. I just purchased a new iMac 27 inch desktop computer and want to give my niece my 21.5 inch late model 2013
2.9 GHz desktop. I am computer friendly and have changed HDDs on all my iMacs before selling them or giving them away. I want to put in a new 2.5 inch Hitachi HD that the computer came with originally and i am not worried about backing up my data, it will be a new installation. I want to install Yosemite OS X onto the new drive. I heard i can do this by booting up and going to Command +R. Then i get a little lost since i am used to booting up from disks.