At the beginning of the week I got a great deal on a 27" iMac for only $50! All it needed was an OS, which I had a friend rip a copy of Mac OS Sierra and install it onto the machine. So far this thing has been an absolute beast. But I'm having a couple of minor annoyances with it. Whenever I go to put it in sleep, start it up or shut it down, it's unbearably slow. It takes close to 2 minutes to start up, sleep and shutdown both take around 1 minute and 15 seconds. I've never had a machine that took longer than 30 seconds, at the most, to put to sleep. Also right after the HDD spins down theres a short beep that sounds like it's coming from the memory banks. I've already reset the PRAM, SMC and even tried reseating the ram and nothing has seems to work. I currently have 4GB of Ram installed. Could it just need to be upgraded to 8GB or is there something seriously wrong here? Thanks in advance for any input.