how to upgrade os x el captain on an iMac 2008

flamenco.angel wrote:

how to upgrade os x el captain on an iMac 2008

This computer is running the most up-to-date version of OS X it can run. It does not qualify for anything newer.

macOS Sierra - Technical Specifications

General Requirements

• OS X 10.7.5 or later
• 2GB of memory
• 8.8GB of available storage
• Some features require an Apple ID; terms apply.
• Some features require a compatible Internet service provider; fees may apply.

Mac Hardware Requirements

For details about your Mac model, click the Apple icon at the top left of your screen, choose About This Mac, then choose More Info. These Mac models are compatible with macOS Sierra:

• MacBook (Late 2009 or newer)
• MacBook Pro (Mid 2010 or newer)
• MacBook Air (Late 2010 or newer)
• Mac mini (Mid 2010 or newer)
• iMac (Late 2009 or newer)
• Mac Pro (Mid 2010 or newer)