Read-Only SD Card(s) - used to be able to read/write

Hello all,
I have searched teh forum and found a few similar threads but I believe my case is different.
For all 3 of my SD cards, they appear as read-only in my MBP (running 10.6.8), whether I connect them via the built-in card reader or via my camera (Panasonic GF1) hooked up to my MBP via USB.
I used to be able to import photos into iPhoto and then delete them from the card but this does not work any more (I do not even get prompted any more) as the card(s) is now read-only (Get Info tells me "Sharing & Permissions: You can only read"). Indeed if I try to delete, drag and drop a file onto it or even erase from disk utility, it will not let me.
Now, most threads dealing with this issue point to the card reader being faulty (or even the lock switch being in the wrong position). I am fairly sure this is not the case here as:
1) the behaviour occurs both through the built-in card-reader and the camera connection and
2) the camera does not "think" that the card is read-only, it can take new pictures, delete or format the card (note that I tried to "lock" the card with the switch and in that case the camera complains and cannot do anything with the card).
Moreover this occurs with all three cards.
On the other hand, my IPhone connected via USB is not locked to "read-only" (for example IPhoto asks me and does delete photos after import).
Thanks very much for any help on this - this is very puzzling!

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
http://hottipscentral.com

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SD card is suddenly read only (and it never used to be before).

I'm not tech-svvy at all, so I'll try to be as detailed as I can with my problem and hopefully some patient soul will be able to give me some step by step instructions on how to fix this haha.
I've had my MacBook Pro for about a year now and I haven't had a problem with transfering photos from my phone and camera onto it. My camera has an SD card and my phone has a Micro SD.
As of a few days ago, I've noticed that when I insert my SD card into the slot, there's an icon to the top left side of the window when I open it that never used to be there. It kind of looks like a pencil with a line going through it, but it still let me transfer photos to my computer, so I didn't think anything of it.
When I tried to transfer photos from my phone's Micro SD, it does the same thing. I can still transfer pictures to the computer without a problem.
The issue becomes when I want to transfer photos from my computer to the card for my camera or the one for my phone. I've tried to look through similar questions on here and elsewhere on the internet, but all I've been able to gather is that the little pencil with a line through it means my cards are in "Read Only" mode as opposed to the "Read and Write" that they should be in.
I don't recall making any changes to any sort of settings on this computer and I haven't had any recent updates to the software.
Also, none of the cards are locked. I know there's a little swtich to the side of them that manually makes them read only, but I never touch them and they're always 'unlocked' as it were.
Can anyone guide me through getting these settings back to the way they were?
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The contact inside the SD card slot could be dirty. you can try to clean them by shutting the system down, get some electrical contact cleaner and put a small amount on the SD card contacts and push it in and out a few times. Let it dry for a few minutes (most of these type contact cleaners alcohol based and dry fairly fast) and power up the system. See if the cards are now Read+Write.
Also check the cards to see if the little switch hasn't been pushed into the Lock setting.
Even though these card may work in your camera and or phone they may be at the end of there life cycle. Try a NEW card and see if that makes a difference.
As a last resort you can always buy a external card reader and connect it to a USB port.Some SD cards come with a small SD card reader that plugs directly into a USB port. The only problem I've had with them is that some of them do not go in all the way on MBPs. The case of the MBP stops them from inserting all the way and or if you have something else plugged in to the other USB port there isn't enough room, right to left, to insert another device. Or you could spend some more money and have Apple Care fix it, that is if none of the above work.
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Occam's Razor nearly always applies when troubleshooting technology issues!
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Message Edited by blutom on 13-Oct-2008 10:42 PM

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