crwdns2934241:0crwdne2934241:0 mayer

crwdns2934249:0crwdne2934249:0:

The newer machines do not come with a system installation DVD.  Your machine shipped with 10.7.3 installed.

To reinstall the system or run Disk Utilities, start up holding down the Command and R keys.

Here's how to do it:  http://www.apple.com/osx/recovery/

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open