RANWALLACE  I don't suggest downloading this update at all.

After downloading the update, my dock disappears with each mouse click.

Programs are locking up and force quit doesn't work.

My cursor is jumping all over the screen.

Called Apple, I may have well just been talking to the idiots at Dell Tech. support. They act like you are an idiot because you are having a problem. And don't forget it's never the OS. It's my fault.

If anyone has suggestions, I would love to hear from you.

Meanwhile I am on Dell.com looking at the Notebooks. I am ready to ditch this Mac.  
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