MBP won't read my SD card?

So here's the issue:
My MacBook Pro won't read my 4GB SD card from my camera. I was able to transfer all of my images earlier this afternoon but now it plainly won't show up. I checked Finder, I checked Disk Utility, and nothing. The Nikon software doesn't recognize it either. It's not like I have a whole boatload of photos to transfer (I only have four pics to transfer). Earlier, I installed the software after I ejected the card, but did not put it back in afterwards. Could it have something to do w/ the software I just downloaded?

If you are using a DSLR camera, like for example a Canon 60D, there may be an option to use a "Low-Level Formatting" on the card. This should make it writable when putting it into the computer.
To test this (and confirm it works) I did the following:
Hardware Used:
Canon 60D camera body
Sandisk 32GB SDHC Extreme Card
Macbook Pro 15" (mid 2010 model) with built-in SD card slot.
Steps:
Place SDHC card into camera (SD card may work as well). Navigate through menu until you arrive at settings that allow the camera to format the card. There may be an option to format it "low-level", which you would then select.
-Note that all files on card will be erased permanently.-
After the camera formats, eject the card from the camera, and place inside the built-in SD slot on the Macbook.
The card should automatically mount, containing both read and write priviledges.
Hope that helps.
~Charlie~
Owner/Founder HotTips! LLC
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MBP won't read my SD card?

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