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joonbug

Why is my iMac running like molasses?

I have the iMac 27-inch (late 2012 model), 8GB RAM, 1TB Hard Drive. All of a sudden after the Mountain Lion 10.8.5 Supplemental update it started running like molasses (apps take forever to open, takes forever to wake out of sleep, long boot up times, etc.) I ran verify disk, verify disk permissions, etc. I found that when I ran verify disk permissions, it stated that the iTunes permissions weren't right so I repaired disk permissions, reboot, still same problem. Ran verify disk permissions again, once again iTunes permissions issues, repair disk permissions, restart, same problem over and over again like Ground Hog Day, please help...

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Met

Make a bootable Mountain Lion flash drive: www.macworld.com­/article­/1167857­/how­_to­_make­_a­_boo...
Run that bootable flash drive and run Disk Utility from there and try to verify the disk and disk permissions.

If that still doesn't help, then you may wanna use that same flash drive to format your Mac.
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