Want to do a fresh install of OS 'cause I'm selling my 2014 iMac ...

[smg, photographer]

My iMac has a 1TB Fusion drive.  I want to do a fresh install of the OS (Big Sur),  ie as if nobody had ever used the machine before.  I want to make sure none of my personal stuff is on the drive when I sell it.  What's the best way to go about this?  Thanks!

[TheDigitalDog]

See: https://support.apple.com/en-gb/HT201065

Be sure if there is any Adobe software that you use Adobe Creative Cloud to uninstall and then log out of that machine. 

[smg, photographer]

Thanks!