The Mac OS Recovery HD partition is a pretty handy troubleshooting tool that can also be used to reinstall or repair the Mac OS.
Managing the Resume Feature in the Mac OS
Managing the Resume Feature in the Mac OS
What Is a Hackintosh Computer?
How to Update Your MacBook Pro
Jak zidentyfikować wersję systemu Mac OS na partycji odzyskiwania
Installing Mac OS Updates From the App Store
Managing the Resume Feature in the Mac OS
Using the Mac's Recovery Disk Assistant
What Is a Hackintosh Computer?
Create Your Own Mac Recovery HD on Any Drive
Using the Mac's Recovery Disk Assistant