Probably because you don't have an SSD. It's a shame that entry level models of both the iMac and Mac Mini have hard disks rather than SSDs, because it gives a

Probably because you don't have an SSD. It's a shame that entry level models of both the iMac and Mac Mini have hard disks rather than SSDs, because it gives a bad experience. I have a 2012 MacBook Air, 8GB, 256GB SSD still works great, had to replace the battery, but that's all. I run virtual machines on it, edit photos and video, no major problems with it speed wise.