how do I recycle an old iMac?

Inca Astronomer wrote:

I have a 2013 iMac that has ceased working (probably a power supply issue). As it trips the power circuit each time I try to turn it on I've been unable to remove my data from it. Does Apple (or another company) provide a service where I can confidently know the data has been erased and the computer recycled?

You can trust Apple Trade In: Apple Trade In - Apple. They offer free recycling.

Jack

Or you can use Apple Recycling Programs

I have a 2013 iMac that has ceased working (probably a power supply issue). As it trips the power circuit each time I try to turn it on I've been unable to remove my data from it. Does Apple (or another company) provide a service where I can confidently know the data has been erased and the computer recycled?

Google for your local electronic’s recycling center and/or electronic’s retailer that excepts computers.