Internet runs slow on my Mac mini

My internet runs slow on my Mac mini after I loded the new OS

I sopped by the apple store with my Mac book air.  It worked well.   I took it home still same problem I have two wireless networks Uverse and AirPort Extreme.  My iMac was connected to the Uverse and the MacBook Air and Mac mini was connected to the Airport. When I connect all three to the Uverse everything works well. When I connect any one to the AirPort it is very slow. It worked fine with the old OS but not with the new OS. Is look like problem is with the AirPort Extreme and the new OS.

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    Hello,
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    Please complete or update your system profile so the users here can properly help you. 

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    Step 1
    This diagnostic procedure will query the log for messages that may indicate a system issue. It changes nothing, and therefore will not, in itself, solve your problem.
    If you have more than one user account, these instructions must be carried out as an administrator.
    Triple-click anywhere in the line below on this page to select it:
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    Copy the selected text to the Clipboard by pressing the key combination command-C.
    Launch the Terminal application in any of the following ways:
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    ☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
    ☞ Open LaunchPad. Click Utilities, then Terminal in the icon grid.
    Paste into the Terminal window (command-V). I've tested these instructions only with the Safari web browser. If you use another browser, you may have to press the return key.
    The command may take a noticeable amount of time to run. Wait for a new line ending in a dollar sign (“$”) to appear.
    A TextEdit window will open with the output of the command. Normally the command will produce no output, and the window will be empty. If the TextEdit window (not the Terminal window) has anything in it, stop here and post it — the text, please, not a screenshot. The title of the TextEdit window doesn't matter, and you don't need to post that.
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    Disconnect all non-essential wired peripherals and remove aftermarket expansion cards, if any.
    Reset the System Management Controller.
    Run Software Update. If there's a firmware update, install it.
    If you're booting from an aftermarket SSD, see whether there's a firmware update for it.
    If you have a portable computer, check the cycle count of the battery. It may be due for replacement.
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    Check your keychains in Keychain Access for excessively duplicated items.
    Boot into Recovery mode, launch Disk Utility, and run Repair Disk.
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    When posting a log extract, be selective. Don't post more than is requested.
    Please do not indiscriminately dump thousands of lines from the log into this discussion.
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  • Larger HD, but internet running slower?

    I have an iMac G5 which was purchased last year with a 160 GB hard drive. A few weeks ago, the hard drive failed, and I sent it in for repair. There were some delays and problems and ultimately we ended up getting a larger hard drive in compensation for the trouble: 250 GB. I was excited about this, until I turned my computer on. I had to make several software downloads and iTunes downloads, and they took up to ten times as long as they had on the previous hard drive. I don't know if this is an internet thing or something to do with the new hard drive, but any help would be appreciated. Why do downloads which previously took 20 minutes now take five hours?
    Message was edited by: Skenariste

    Skenariste wrote:
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    Available: 218.79 GB
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