I frequently get asked how to safely dispose of old computer equipment. There are a few key steps:
1) Retrieve any data you might need.
2) Securely erase the device.
3) Sell, donate or recycle the device.
For step one, plug in the computer and fire it up if it still works. Save the files you need – to an external hard drive, flash drive, cd or copy them over the network. If you have current backups you might be able to skip this step.
For step two, I’d use a bootable CD of Darik’s Boot and Nuke (DBAN) in most cases. For a Mac, the operating system disk can be used to launch the Disk Utility. Be sure to do a multiple pass erase (it will probably take a couple hours).
For step three, sell the computer if it’s worth anything. Craigslist and eBay are typically pretty easy. If the computer is more than 5 years old it’s probably not worth a whole lot so consider giving it away to someone that might want it. If you can’t find someone that wants it, take it to a computer recycler. In Orange county, the landfill and some of the recycling centers take computer equipment.
If you need help with this sort of thing let me know and I’ll get you started.