If you need help identifying which Mac computer you have, you can view
a list of technical specifications on Apple's support site.
http://support.apple.com/specs/

If the make and model of your computer doesn’t appear in our list,
that’s OK. You can still recycle it.

Recycle your computer or display for free.

If all you want is to dispose of your unwanted equipment – regardless of
brand – we can help you do that. Apple contracts with Sims Recycling
Solutions to responsibly recycle computers and displays from any manufacturer.
Generate a prepaid shipping label by going to www.applepoweredbysims.com.
Then pack up your equipment using your own box and send it off. For more
information about Sims Recycling Solutions or questions about this program
call 800-966-4135.