My Late 2012 mac mini has been acting weird lately. I get a quick flash of the random spinning beach ball just from moving the mouse cursor on different webpages including macrumors forum.Not sure if this is related to the maverick update ?. I never noticed this with mountain lion, or if the apple stock 8GB ram or SSD is about to take a dump ? Can you still do the apple diagnostics or hardware test without the install disk ? I tried a computer restart holding the D down while the mac mini restarts but the hardware test screen never started.I have apple care but unfortunately I don't have any apple stores near me to have them test it.I have my system backed up daily with carbon copy cloner and time machine in case anything happens. Any help or advice appreciated !