I have a spinner and 4gb in this machine. It's a dog when I run El Cap on it with constant spinning beach balls but with Windows 10 it simply is very usable. I actually find Windows 10 to be a very nice OS in that it's interface is very swish and feels lightweight. I hate to say it but El Cap is pretty bloated compared to Windows 10 on this system and I wonder if Apple needs a Snow Leopard style reset of OS X to stream line it for older, bottom tier systems, so they can run as good on moderate hardware.