The Mac Pro First Generation is an Intel Xeon-based workstation computer manufactured by Apple Inc. The first generation model includes the machines from 2006 through 2008.

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Why is my Mac Pro so slow to respond to everything?

My MacPro takes up to 2-5 minutes to complete a task whether it is loading a program or surfing a website. Doesn't matter if I am opening a hard drive or opening a folder or a file. Things that used to happen instantly now take one to two minutes to occur. I have 16Gb ram and 400Gb free space on my hard drive. I have repaired permissions and ran Disk Utility to repair the disk more than I can count and every time it says it is okay. I have erased the disk and replaced the Snow Leopard OS at least 3 times. I have tested the ram and unplugged all non-essential peripherals to no avail. Software updates that used to take 2-3 minutes now drag on for up to 10 minutes. I've disconnected the ethernet to run the computer on it's own and it still unreasonably slow to react. I am running OSX10.6.8 and CS5-I had run this software prior for at least 18 months without incident. I have reinstalled all the software from both Time Machine backups and from the disks and they still quit unexpectedly. Does anyone have a clue?

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I took the computer to my local Apple store and had them run a diagnostic overnight. The next day they called to tell me the hard drive was bad. Even though I had run many Disk Utility diagnostics of my own and every time the results were, "The disk appears to be okay."

I bought two new 1TB drives (about $100 each) and slid them in, replacing the old drive. Installed Snow Leopard, installed the upgrades (including the combo upgrade), then ran my Time Machine restore backup and I have my old speedy MacPro again.

The other hard drive?

I intend to put Mountain Lion on that and do an Option-Start whenever I want to run the newer OSX with CS6.

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Go under the Apple in the upper left hand corner to "about this Mac", first see how much of the 16 GB of RAM are actually being seen. How many hard drives do you have? When booted from the DVD does it still run slow?

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