SD Card Slot is Read-Only

hello, i have a 13 inch MacBook Pro, and every card I insert is showing up as read-only. this is for SD Cards as well as Micro SD cards in adapter sleds.

i have verified that the card is not locked, and they are fully writeable when using a USB SD Card adapter.

any ideas?

13 in macbook pro, Mac OS X (10.6.1)

Posted on Sep 18, 2009 7:27 PM

Top-ranking reply

Chuck Bernard

Level 2

330 points

Posted on Dec 18, 2009 2:44 PM

OK, so I have found a solution. For me anyway. The "lock" switch on SD cards can be in either locked or unlocked position. OR, you can actually slide it part way between. It appears as though the sensor on my MacBook Pro is faulty and if I slide the "lock" switch on the card half way between locked and unlocked then the card is read-write mode.

If the switch is in either the fully "locked" or fully "unlocked" position the card will show up as read-only!

I will probably go to Apple and get it fixed.

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19 replies

8bitkid Author

Level 1

14 points

Sep 30, 2009 11:26 AM in response to Inte Gloerich

unfortunately, even when i try both settings, it is still read only, and this happens with several different cards.

Nov 19, 2009 1:21 AM in response to 8bitkid

8bitkid i have thesame problem as you. Couldyou finally fix it? if so, how did yo do it?

Dec 3, 2009 10:16 AM in response to farky85

It works correctly with the SD cards (not SDHC) I've tried. I haven't tried SDHC cards.
What type of card are you using?

eww

Level 9

53,052 points

Dec 20, 2009 5:45 AM in response to Michel Vézina

Michel: What make is your camera? Canon cameras typically don't allow the cards insdie them to appear on the desktop when connected directly to a computer.

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SD Card Slot is Read-Only