Take the 2-minute tour ×
Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

I got a iMac from a friend and it originally had mountain lion. I was able to login and use it like normal for about 3-4 times. Then it won't log me at all.

I got apple and some other experts and was recommended to change the hard drive. I got another hard drive extacly the same size, same company etc.

I also bought snow leopard from apple store. I start the iMac and hold down the "option key" and I select the DVD installation (hard drive doesn't appear here) and when I select it then it goes to a white screen with grey apple logo and it nothing else happens from there onwards.

I can't access the iMac at all e.g. disk utility and so on.

share|improve this question
2  
If you can't see the hard drive in the installation even though it's brand new, you have a hardware error somewhere else. Possibly the motherboard or the hdd > motherboard connection. –  bigbadonk420 Feb 28 '13 at 20:22

1 Answer 1

First try wating a little longer for the DVD to load. If not success, try using an external USB DVD-RW drive and boot the installation DVD-ROM from there. Assuming the Mac has no other problem, you should be able to start the Installation. If you suspect RAM or other problem, hold D while booting to enter diagnostics mode and check the RAM for errors.

Since the hard disk is new, it is not yet bootable, that's why it doesn't appear as a selection when entering boot selection mode. After successful installation of MacOS it should appear as a choice.

I hope that helps.

share|improve this answer

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.