Ask Different is a question and answer site for power users of Apple hardware and software. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

Recently my OS X Snow Leopard has been taking a really long time to boot up. Suspecting that something might be wrong with the HD I did a disk verification using the Disk Utility. It showed me an error message stating that i need to repair the disk using the disk utility from the installation disk.

However, my CD ROM does not function properly and I am unable to boot from the installation disk.

Is there any way I can use an external HD to boot from? Any solutions that you could suggest?

[EDIT] Unfortunately I dont have access to another mac

share|improve this question
Do you have access to another Mac? – ephsmith Jul 9 '12 at 13:14
unfortunately I dont have access to another mac – wheee Jul 12 '12 at 17:31

You will need a USB drive (8GB) and access to another Mac or a functioning CD ROM drive. You can use any external drive instead of a USB drive, but be aware that you'll have to format the drive and you'll loose any content on it.

The procedure to make the external HD bootable is explained at Upgrading to Snow Leopard without optical drive

share|improve this answer
here another nice guide with screenshots… :) – Chrisii Jul 9 '12 at 7:23
I've made the edit, i dont have access to another mac. Sorry dint mention that earlier. thanks for your answer – wheee Jul 12 '12 at 17:31

Your Answer


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.