6 Replies Latest reply: Dec 7, 2008 8:26 AM by Jane Knox
Starshadow Level 1 Level 1 (0 points)
Ok, so I have been having some trouble with my SD card's lately. No matter which card or which card reader I use my mac always says that my SD card isn't readable and MUST be reformatted! Though I don't know how to do this. So I came to the best place for this kinda Mac problem. Does anyone know what's wrong?

I don't know if this will help you but here's all the disc info.

Partition Map Scheme : Unformatted
Disk Identifier : disk2
Media Name : SD/MMC Card Reader Media
Media Type : Generic
Connection Bus : USB
USB Serial Number : 058F011111B1
Device Tree : /PCI0/EHC2@1A,7/@2:0
Writable : Yes
Ejectable : Yes
Mac OS 9 Drivers Installed : No
Location : External
Total Capacity : 3.7 GB (3,965,190,144 Bytes)
S.M.A.R.T. Status : Not Supported
Disk Number : 2
Partition Number : 0


Notice how it says it's unformatted. Even though I just bought this new one today. Man oh man do I need help here! This is cutting into my work time! I can't do what I need to until I get this to work!

Mac book, Mac OS X (10.5.2), SD card was corrupted
  • Jane Knox Level 3 Level 3 (690 points)
    What are you using the SD car for? If it is for a camera or smartphone, put the SD card in the device and format it there.

    If it is for use on your Mac only, open Disk Utility, click on ERASE and format the card for OSX Extended.

    Does that help?
  • Starshadow Level 1 Level 1 (0 points)
    The thing is, that when I do this the loader, for the eraser status, just stays at the very beginning. I waited for hour after hour, but nothing!

    Maybe the problem is the program? Because I've used it on 3 different cards, and 2 different readers but no luck.

    Message was edited by: Starshadow
  • Jane Knox Level 3 Level 3 (690 points)
    What are using the card for? If it is for a camera or other device, you should format it in the device.

    What size is the SD card? Is your SD card reader capable of reading a card that size? (I have two older SD card readers that only read cards up to 2 GB and when I put a 4 GB card in that reader, it fails.)

    If you are ONLY using the SD card on the Mac, try to Partition the SD card - after verifying that the reader you are using can handle it.
  • Jane Knox Level 3 Level 3 (690 points)
    ... and by the way, your tag line shows OSX 10.5.2

    If that is correct, you should download and install the 10.5.5 COMBO updater from http://support.apple.com/downloads/MacOS_X_10_5_5_ComboUpdate

    Run Disk Utility Repair Permissions once before and again after you run the 10.5.5 COMBO system update.

    Hope that helps.
  • Starshadow Level 1 Level 1 (0 points)
    The three SD cards I use are as follows.

    Kodak 512 MB
    Canon 16M
    SanDisk 4GB

    upgrading to 10.5.5 didn't do much of anything.

    The Canon one started to work for some reason but it's too small on memory for me to use for everything I need to be using. I think as you said SanDisk might just be too big. But Kodak is most likely corrupted. That's just what I think is the deal, not 100% sure on it though. Does that give you any idea as to why it doesn't work?
  • Jane Knox Level 3 Level 3 (690 points)
    Canon 16M ... upgrading to 10.5.5 didn't do much of anything ... The Canon one started to work for some reason

    Are you sure that the 10.5.5 Combo installer didn't "fix" the 16 mb card?
    SanDisk 4GB ... I think as you said SanDisk might just be too big.

    Verify that your card reader can handle 4GB. Most likely, that is the problem.