bought refurbished Imac 27 inch, but previous user is still active. How to reboot?
bought refurbished Imac 27 inch, but previous user is still active. How to reboot?
bought refurbished Imac 27 inch, but previous user is still active. How to reboot?
Sounds like you didn't buy "refurbished", you bought "used". They did not properly prepare it for sale.
Purchased from which merchant? What is their return/refund policy?
bought refurbished Imac 27 inch, but previous user is still active. How to reboot?