Macbook Pro no longer recognises my Verbatim 47519 640GB 3.5" USB2.0 External Hard Drive

Hi,
I have got a Verbatim 47519 640GB 3.5" USB2.0 External Hard Drive that I have partitioned since transferring from a PC to my Macbook Pro and have been successfully using the external hard drive since my purchase.
In the last week, my Macbook Pro has suddenly stopped recognising the external hard drive and I cannot access anything.  There is nothing wrong with the hard drive as I have been able to plug this in to 2 Windows PC laptops and the drive works fine, I can access the Windows side of the drive with no problems whatsoever.
I have also tried to Disk Utility and also the Preferences from the Apple logo and nothing.
Has the recent update caused this to happen?
Thanks in advance if anyone can help.....

atappe02 wrote:
but I suppose I could go to an Apple store and plug it in? Haha
That will work.  Bring your MBP and external HDD to a genius bar and have them check it.
atappe02 wrote:
When you say enclosure, do you mean the actual casing of the HHD? I was warned against pulling anything apart!?
Yes.  I do not know who or why you were warned but I have taken an installed many HDDs in enclosures.  It is not brain surgery and just requires a few tools.  Usually just a #00 Phillips driver is required.
Ciao.

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