Internal card reader thinks SD card is in "read only" mode??

I just took some pictures with my digital camera which use SD cards.
I then took the card out of my camera and put it into the built in SD reader on my 13" MacBook Pro. (same way as I always do)
However, the Finder thinks my card is in "read only mode" as I can not delete or add pictures on the card. I took out the card and toggled the read-only switch thinking maybe it got stuck or something, and tried it again. Still no luck.
Then, I tried a USB card reader. That reader detected the card, and let me read and write to the card.
This is the first time this has ever happened.
Any ideas why the internal card reader wouldn't anything other then read the card while my USB card reader could read and write no problem?
Thanks,
Scott

I reset the PRAM but it did not help.
I think I found the solution though.
It depends on the way you insert the card.
You can't just slide it in. Rather, you have to push it in a special way (which I can't describe or remember)
So I guess the answer is, if the card comes up as read-only, take out the card, and push it in a different way until to comes up correctly.
I replicated this issue twice so that is why I believe it is the alignment that is the problem.
If it gets any worse, I'll probably have to get the slot serviced but considering I only use the slot once a month or so, its not top priority. Too bad I couldn't just have an extra USB port, or an express card slot - but apparently Apple thinks SD cards are more important...

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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

Can anyone recommend a USB CF card reader that will work in my Macbook Pro Retina? My USB card readers for CF cards do not work

At present, the only way I can load photos from a CF card to my new Macbook Pro Retina is by loading them onto an external hard drive via an old PC that can accept either of my USB card readers, then plugging the external hard drive into my MBP. Neither the USB card reader or the cable that comes with the Canon HDSLR camera will transfer photos directly to my MBP. I find it unbelievable that I have to go to a PC to load photos because I can't do it with my new MBP.
Has anyone found a reliable USB CF card reader, or one that connects via thunderbolt or HDMI, at any price, that will work directly with the new MBP Retina?

This is what we need:
Location photoshoot - we use the Canon EOS 5D Mk II still camera & the Canon FX100 pro camcorder.
CF cards are: SanDisk Extreme UDMA & SanDisk Extreme Pro UDMA 6 for video (I think they are both Type II) My Mac recognises them both as FAT 32 format
My MBPRetina is on the latest version of Mountain Lion OSX 10.83
the files from the camcorder will transfer to my MacBook Pro Retina directly via the camera's cable but it is quite slow & it means I cannot continue to film while downloading files but this we can live with.
the files from the still camera Canon EOS 5D Mk II will not transfer directly via the camera's cable - have yet to get the Canon software to download, but via the camera's cable will not help anyway as we need to have the still camera free to keep shooting.
We need to be able to take out the CF card from the first part of the shoot & download the still shots while just on the Macbook's battery power, while we insert a fresh CF card back into the still camera to continue with the next part of the shoot simultaneously (while the first card is downloading.)
The files from the first part of the shoot will be both in RAW (.CR2) & Jpeg format. We just need to quickly transfer the jpegs, then I do a quick sort, batch the best ones as black/white images, & use these in a client slideshow immediately after part 2 of the shoot.
Obviously we need fast data transfer speeds, & rely on the MBP's battery power while on a location shoot.
The card readers I have tried are an older specific CF card reader branded as Palm, & a USB 2 multi card reader branded as Travel Flash. With both readers, the lights on the readers flash on & off, & the MBP recognises the card & the files will even appear both in Finder & in i-Photo, so it starts importing, then aborts with an error message saying:
'The Finder can’t complete the operation because some data in “” can’t be read or written.
(Error code -36)'
& another message saying:
'the disk was not ejected properly'.
So it appears the MBP does read the CF cards but the card readers don't stay connected, no matter what angle I put them on or however many times I re-connect them.
Yes, they are probably cheap & I want to buy a decent one.
So, in summary:
the card reader needs to work when the MBPR is only on battery power (I read in some forums that some USB card readers aren't so reliable on the laptop's battery power)
the card reader needs to be quite fast. I have read the USB 3 readers won't read CF cards at higher than USB 2 speeds. Is this true? Are the firewire connected ones faster, & if so, are they still reliable on the MBP's battery power?
From research, it appears my problem is associated with my specific model of Mac & platform, being MacBook Retina on Mountain Lion OSX Version 10.83. If any of the recommended card readers have been successful with this, plese let me know.
Thanks heaps for the suggestions so far.

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SD Card Slot READ ONLY mode.

I have this problem.
My SD Card Slots it's in READ ONLY MODE.
I already use the SD cards in this computer without a problem, they we're always read/write. Not anymore since a month. (I think from the last software update, but I'm not sure of this).
Someday, without notice, all these cards are read only on my macbook pro.
I don't have this problem with my G5. I can read/write on these SD cards. Of course, all of them are unblocked.
I tried in several formats (formatting the cards with my G5). Same results.
My Macbook Pro 13 (last edition so far, I brought it on November 2010).
I read is probably A Snow Leopard 10.6.6 problem.
So I reinstalled the system without updating the computer, but the problem is the same.
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Message was edited by: Daniel_Italia

Went to the Apple store today. I opened up my MBP the SD card worked perfect, no issues.. I couldn't believe it. But after we (me and the tech) removed the card a few times / formated it. It stopped working and started setting it for read only, and we couldn't get it back to read / write. IE same issue as we were posting.
The tech spoke to his lead technician, which both said they have never heard of this, but decided that the motherboard is defective and needs to be replaced. So I left it there for them to replace it. Price, if out of warrenty, was 650.00. Can't remember if that included labor. I have AppleCare (which they didn't have on record) so free for me. Glad I paid the 350 when I bought the laptop.
Overall I waited an extra 15 minutes before being seen. A little annoyed about that. But the tech was very nice, professional, and helpful. I did ask about the SMC, but we were talking about a couple of things and that kind of got lost in the shuffle and I completely forgot.... Sorry I had "I am Number 4" on my mind as we were planning on seeing that next.
Will update as soon as I get it back
Message was edited by: skygremlin

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Solved!
Go to Solution.

From Personal Systems Reference; Lenovo ® ThinkPad ® Notebooks; April 2010 - Version 376
5-in-1 reader (MMC, Memory Stick, Mem Stick Pro, SD, SDHC)
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Internal card reader thinks SD card is in "read only" mode??

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