problem reading dvd OS X Leopard

There are some reasons why attempting to install Snow Leopard can fail.

Suitability of your computer.

Valid installation DVD.

Hardware known to perform satisfactorily.

1. Is you iMac able to run Mac OS 10.6?

General requirements for 10.6 Snow Leopard

• Mac computer with an Intel processor

• 1GB of memory (though I'd recommend 2GB)

• 5GB of available disk space for the installation process.

• DVD drive for installation

2. Are you using the retail 10.6 DVD that looks like this? (A Grey disk will likely not work as they are hardware specfic.)

3. Does your optical drive play DVD's normally without any problem? If you think the drive is old and a bit dodgy, try using an external optical drive if you have access to one.

Hi Willemill

...installation stops because of another failure that it isn't possible to install some files.

Could you write down what that message says please, and post it here.

Thanks for posting back, Willemill. Do you know that external optical drives (CD\DVD units) that plug in to a computer are inexpensive and reliable? Also the best thing is, there is no need to disassemble your iMac to replace the one you have. Just leave the old one inside and use the external one.