My cousin recently got an "iMac G4" verson 10.1.4. She wanted my father and me to look at it, a couple things were not working properly. My father and I are quite fine with Windows, and I am ok with Linux, but neither of us have worked on a mac before. The first thing is safari, it is not working. Actually it is not all there. I downloaded 'Safari' and the update, but the computer cannot execute 'dmg' files. It does not have 'Disk Image Mounter', so I went to 'Mac Help', ran a search on 'dmg', it told me a little about 'dmgs', and then there was 'Open Disk Copy for me." command. I clicked on it, but nothing happened. Are these programs supposed to come with the operating system? Do I need to reinstall? Thank you for your time.