Currently Being ModeratedDec 3, 2012 10:32 PM (in response to shldr2thewheel)
When I insert it, it says "The disk you inserted is not readable by this computer."
So I select Initialize... Partition... 1 Partition... ExFat... Apply... Partition.
"Partition failed with the error: POSIX reports: The operation couldn’t be completed. Cannot allocate memory"
I also tried with SDFormatter.app from sdcard.org (SD Association). I get "Could not format the card."
If I put it in my plug-in USB Card Reader, it formats fine (1 ExFat partition, as before) and I can create files on it.
But then I eject it, insert directly into the card reader slot, and I get "The disk you inserted was not readable by the this computer" again.
Then I put an old 8 GB SD directly into the slot and it works fine. And I regularly use the slot with another card for my Camera.
I also just tried the new 128GB card in my Olympus point-and-shoot, still ExFat formatted, and it works fine... very fast. Shows room for 7445 RAW+JPG files.
Currently Being ModeratedDec 3, 2012 10:35 PM (in response to timeOday)
I have three Class 10 SDXC cards that work just fine (although, with one, I have to wiggle it around a bit to get a good connection).
Not sure why you're having problems...
Currently Being ModeratedDec 4, 2012 6:20 AM (in response to clintonfrombirmingham)
"I have three Class 10 SDXC cards that work just fine"
Are any of them 128 GB? Also, are you still on OSX 10.6.x like me, or have you moved to 10.7 or 10.8? To me it seems like maybe support for 128GB doesn't work in 10.6.
Currently Being ModeratedDec 4, 2012 9:36 AM (in response to clintonfrombirmingham)
I just tried the card in the newer (retina) macbook pro of a co-worker and it works fine.
The Vendor ID, Device ID, and Revision of the built-in card reader is identical on his machine, but he is using OSX 10.7.
Based on that, I am leaning towards the theory that 10.6 is at fault. I have applied available OS Software Updates (except iTunes) yesterday. I can't think of much more to try but upgrading to 10.7 and see if that helps. (I wouldn't really mind but it has to be done through our IT dept so who knows how long that will take).
Currently Being ModeratedDec 6, 2012 9:08 AM (in response to timeOday)
I tried the card in a slightly older MacBook Pro (just before Thunderbolt) with OSX 10.6 and it worked fine.
However it has a different card reader
Built in SD Card Reader:
Vendor ID: 0x05ac
Product ID: 0x8403
Also, after formatting the card in another device, I re-inserted and ejected it into my MacBook about 20 times and 2 times it was able to read the partition table. This makes me think I must have a flaky motherboard (even though it reads other SD cards fine) and upgrading to 10.7 may not fix it. Who knows.
Currently Being ModeratedDec 11, 2012 6:50 PM (in response to timeOday)
I ended up exchanging the card for an identical model, which works fine. (I did not upgrade the OS).
I can't explain this, since the previous card worked in two other MacBooks, and my camera, and a USB card reader.