For Good-Condition iMacs: Sell It
Your old iMac may be a wanted upgrade for someone else.
If you’re selling your iMac, you’ll need to identify your iMac.
Once you know which model your iMac is, check its hardware and provide that information to potential buyers.

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you might get it off your hands quicker by finding a local buyer with Facebook Marketplace or Craigslist.
However you decide to sell it, include as much information as possible to speed up the sale.
Call local charities and youth centers to see if they accept computers.

Courtesy of Apple
National organizations likeGoodwillandHabitat For Humanityrun thrift stores to fund their charitable operations.
Electronics cant go in your city recycling bin, but many companies accept old electronics for recycling.
If you want to see more options, check out theEPA list of companies that accept electronics for recycling.

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Whether you intend to sell or donate it, you have no control over where it ends up afterward.
FAQ
If your iMac supports target display mode, you canuse your iMac as a monitor.
Connect your iMac with another Mac using a Thunderbolt or Mini DisplayPort cable.

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Then pressCommand+F2on your iMac to display the other Mac’s desktop.
To exit target display mode, disconnect the Macs or press theCommand+F2keyboard combination again.
You have several options for upgrading your older iMac.

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