Insert a DVD when prompted and proceed to Burn it. Do not drag and drop the image file into Disk Utility during this step. Click on the image file, then click the Burn button. Step 5: Select additional software packages to install. Step 4: Select how you want to install Mac OS X. Step 2: Follow the onscreen instructions. Step 1: Insert the Mac OS X Install disc. Navigate to where you saved the DVD image created in the previous section. How do I reinstall OSX Leopard Step 1: Insert the Mac OS X Install disc. Click Burn on the Disk Utility toolbar (upper left).

Launch Disk Utility (Applications > Utilities). Leave the image alone and proceed to the next section. Once your image has been created DO NOT mount it. Leave Image Format at Compressed (default) and Encryption at None (default). Select the destination where you wish to save it. Click New Image on the Disk Utility toolbar. In the pane, select the Mac OS X Install DVD by clicking on it once. In Disk Utility, you will notice a white pane on the left hand side.

Insert the retail Mac OS X Install DVD into your drive. How to Make a Non-Commercial DVD copy of MAC OS X (Note: all data in the selected drive will be overwritten so that the wizard can install the needed data to make the external hard drive or USB stick into a recovery disk.) It will take some time for the process to complete. Now comes the fun part, you'll first want to open the dmg you just downloaded and have it mounted.If you need to make a bootable copy of your OS installer disk (good idea to have when you travel) follow this: Select the drive you want to use to create the OS X Recovery Disk. OS X 10.6.0 Golden Master(10a432) (opens new window) OS X 10.5.0 Golden Master(9a581) (opens new window) Note that these images require you to have an Apple Developer account to access. OS X 10.6.7(10J4139) (opens new window) MEGA Mirror (opens new window) OS X 10.5.7(9J3050) (opens new window) MEGA Mirror (opens new window) To Start up from a bootable CD, DVD, or USB thumb drive (such as OS X install media), press and hold the C key. Keep holding until the described behavior occurs. OS X 10.4.10(8R4088) (opens new window) MEGA Mirror (opens new window) 1 You need to press and hold the key (s) immediately after you turn on your Mac and hear the startup sound. The below installers were pulled from genuine Mac restore disks with their SMBIOS lock removed, contents of OS X itself have not been modified in any way. This method instead relies on hosted images either from Apple or Acidanthera, and restoring onto your drive.

Getting started with ACPI (opens new window).

Apple snow leopard recovery disk to dvd