Apple iMac (21.5-inch and 27-inch, Mid 2010) - Manual (Page 55)

55 Chapter 4 Problem, Meet Solution
3 Double-click Install Mac OS X.
4 Follow the onscreen instructions.
In the pane where you’re prompted to select a disk, select your current Mac OS X hard
disk (in most cases, it’s the only one available).
5 To control which parts of Mac OS X are installed, click Customize, and then select the
parts you want to install. Click the disclosure triangle next to Applications to select the
checkboxes for any applications you want to install.
6 When the installation is complete, click Restart to restart your iMac.
7 Follow the prompts in Setup Assistant to set up your new user account.
If you want to erase and install, make sure you back up your user data before you start.
Use Disk Utility on your Mac OS X Install DVD to erase your hard drive. For information
about Disk Utility and its options, see Mac Help, or open Disk Utility (in /Applications/
Utilities/) and choose Help > Disk Utility Help. You can also review detailed instructions
in the following Kbase article: http://support.apple.com/kb/HT3910?
Installing iLife Applications
You can reinstall the iLife applications that came with your iMac if you accidentally
delete them, or after you perform an erase and install.
To install the iLife applications that came with your iMac:
1 Insert the Applications Install DVD that came with your iMac.
2 Follow the onscreen instructions. In the Installation Type pane, click Customize.
3 When the installation is complete, click Close.