First off, it was delivered in less than a week. This product was the best decision ever! I was skeptical but I bought this for digital marketing classes. It stated it came with high serria & I was able to update to Big Sur upon start up. It didn’t come with an apple mouse & keyboard, but the ones it came with are very nice and were brand new logitech. The computer is fast, looks brand new and I would definitely recommend buying from this seller. Completely satisfied!!! First time to use an iMac & was frustrating at first, but getting the hang of it, love it now!