OS X Lion system requirements

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To use Lion, make sure your computer has the following:
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- An Intel Core 2 Duo, Core i3, Core i5, Core i7, or Xeon processor 
	
- Mac OS X v10.6.6 or later to install via the Mac App Store (v10.6.8 recommended) 
	
- 7 GB of available disk space 
	
- 2 GB of RAM 


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If your Mac does not meet these requirements, you will need to upgrade your Mac before installing Lion.
For more information, see OS X Lion - Technical Specifications.
Mac OS X v10.6 Snow Leopard system requirements
To install Snow Leopard for the first time, you must have a Mac with:
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- An Intel processor 
	
- An internal or external DVD drive, or DVD or CD Sharing 
	
- At least 1 GB of RAM (additional RAM is recommended) 
	
- A built-in display or a display connected to an Apple-supplied video card supported by your computer 
	
- At least 5 GB of disk space available, or 7 GB of disk space if you install the developer tools 

For more information, see the Mac OS X 10.6 Snow Leopard Installation and Setup Guide.