My MacBook Pro do not read USB modem

I am trying to log in to the internet using and external modem that is connected to the USB port on my MacBook Pro. The computer do not recognize the modem.

Go to the website of the modem manufacturer and see what drivers you need for your version of OS X.

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    Are both , the printer and the mac in the same network?
    You can find the right software and instructions here:
    http://welcome.solutions.brother.com/BSC/public/eu/eu_ot/en/model_top/colormfc/m fcj870dw_us_eu_as.html?reg=eu&c=eu_ot&lang=en&prod=mfcj870dw_us_eu_as

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    http://support.apple.com/kb/HT3553

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    Click on the link to see more details and screenshots. 
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    Hi,
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    this is what it shows
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              Media Name :           USB DISK 2.0 Media
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              Connection Bus :           USB
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              Partition Number :           0
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    Hi aqeelfromkuwait,
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    iPhoto: Troubleshooting Camera Connections - Apple Support
    OS X Mavericks: If a USB device isn’t working
    Cheers,
    Jeff D. 

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      Model Identifier:          MacBookPro5,3
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      Serial Number (system):
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    Get a blue ray compatible player and the associated software.  Apple does not support it natively.
    Here is an option:
    http://eshop.macsales.com/item/OWC/MRSSBD6X/
    Ciao.

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