And it's starting to really piss me off ! >:( Because even by using the disk utility in mac os, I cannot format the card anymore.
Since I tried with SD cards formatted in my t4i and in a nikon coolpix, and the result is the same (read-only), I guess the problem is on the imac side.
So, did it happen to anymore ? Does anyone knows a solution ?
(because I would REALLY like to shoot RAW with my t4i :D and since I cannot copy anything from the imac to the SD card... well, I think you got it :p)
PS : I hope i'm posting this to the good part of the forum. If not, I apologise.
This may be a stupid question, but have you checked that the card's write-protect tab hasn't inadvertently been slid to "lock" ?
Edit: It is of course possible that the lock-tab switch in the iMac is stuck...
https://discussions.apple.com/thread/2166984?tstart=0
Thanks for your answers. Well, it appears that i've finally reached a problem with my imac. Not bad after 3 years with none ;)
here i have a similar issue, i cant reformat, copy paste / do anything with my sd card formerly formatted at the eos m camera.. but I m inl linux, tried different things, not even gparted with sudo rights can do anything.. any idea?? thanks :)