The new MacBook Air 11" doesn't have an SD card slot.
== Update ==
Apple has a tech note describing the specs of the SD slot on recent Macs: [http://support.apple.com/kb/HT3553|About the SD card slot]
The MacBook Air is not mentioned in the list of Mac models with an SD slot, but I think it fair to assume they just haven't updated yet and that those specs apply to the new 13" MacBook Air. If so, then you can use any SD card up to 32GB, and possibly larger (they are a bit vague on that).
The slot is rated for 240Mbit/sec -- which is to say, 30 MByte/sec. To run at full speed, Class 10 SDHC cards require a minimum speed of 10 MByte/sec, so the MacBook Air should easily be able to support them (and pretty much any other card).
Apple has a tech note describing the specs of the SD slot on recent Macs: [http://support.apple.com/kb/HT3553|About the SD card slot]
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Apple has a tech note describing the specs of the SD slot on recent Macs: [http://support.apple.com/kb/HT3553|About the SD card slot]
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The MacBook Air is not mentioned in the list of Mac models with an SD slot, but I think it fair to assume they just haven't updated yet and those specs apply to the new 13" MacBook Air. If so, then you can use any SD card up to 32GB, and possibly larger (they are a bit vague on that). The slot is rated for 240Mbit/sec -- which is to say, 30 MByte/sec. Class 10 SDHC cards require a minimum speed of 10 MByte/sec, so the MacBook Air should easily be able to support them (and pretty much any other card) at full speed.
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The MacBook Air is not mentioned in the list of Mac models with an SD slot, but I think it fair to assume they just haven't updated yet and that those specs apply to the new 13" MacBook Air. If so, then you can use any SD card up to 32GB, and possibly larger (they are a bit vague on that).
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The slot is rated for 240Mbit/sec -- which is to say, 30 MByte/sec. To run at full speed, Class 10 SDHC cards require a minimum speed of 10 MByte/sec, so the MacBook Air should easily be able to support them (and pretty much any other card).
Apple has a tech note describing the specs of the SD slot on recent Macs: [http://support.apple.com/kb/HT3553|About the SD card slot]
+
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The MacBook Air is not mentioned in the list of Mac models with an SD slot, but I think it fair to assume they just haven't updated yet and those specs apply to the new 13" MacBook Air. If so, then you can use any SD card up to 32GB, and possibly larger (they are a bit vague on that). The slot is rated for 240Mbit/sec -- which is to say, 30 MByte/sec. Class 10 SDHC cards require a minimum speed of 10 MByte/sec, so the MacBook Air should easily be able to support them (and pretty much any other card) at full speed.