- Jul 16, 2007
Just checking on here to see if anyone has any ideas, as Apple support can't seem to help. Have installed El Capitan on my mid-2010 21" iMac (as well as my mid-2010 Air, which is working fine and has pretty much the same installations), and it's totally destroyed - literally unusable. Constant spinning beach ball, 5 - 10 minutes to load an app... basically now too slow to do anything. Have re-installed the OS, cleared out loads of old bits and pieces from various files, zapped the PRAM, run Disk First Aid, disconnected all USB peripherals.... nothing. I often hear the sound of the hard drive working, though not constantly... any ideas/thoughts/suggestions? Many thanks....