http://support.apple.com/kb/HT3553  About the SD and SDXC card slot      
Summary
Some Mac computers feature an SD (Secure Digital) or SDXC (SD extended 
capacity) card slot that enables these computers to read and write data to SD 
media inserted in the slot. Learn more about the SD and SDXC card slot.         
         


Sent from Ronni's iPad

On 29/03/2012, at 5:15 AM, tom samson <thefr...@iinet.net.au> wrote:

> Sorry mine is a 2009 13" Macbook
> tom
> On 28/03/2012, at 8:16 PM, cm wrote:
> 
>> Hi Tom,
>> 
>> That slot is known as an ExpressCard/34 slot. Here is a MacWorld article 
>> with some uses for it
>> 
>> http://www.macworld.com/article/1134707/expresscard34.html
>> 
>> To be honest I have never used mine, though it is comforting to know it is 
>> there. :-) Probably a good indication that it should be removed for future 
>> models that have Thunderbolt.
>> 
>> Cheers,
>> Carlo
>> 
>> 
>> On 28/03/2012, at 20:11 , tom samson wrote:
>> 
>>> I have a Macbook Pro and there is a Card slot on the left side. It has 
>>> never been used. My question is what could the best way be to use it. I am 
>>> really thinking about plugging in a semi permanent sd card as a digital 
>>> drive but the cards sit proud of the port So what else is there.
>>> 
>>> tom samson
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