I have a 21.5in Mid 2010 iMac running OSX 10.8.4 (Mountain Lion). If I start it with an SC card in the slot, the card is mounted (and the drive and card show up in Disk Utility). If I eject it then re-insert it, it won't mount (and doesn't show in Disk Utility). On restart, it shows up again.
I have read and tried various suggestions on the Apple Forums, and none of them have worked.
iMac, OS X Mountain Lion (10.8.4)
Zap the PRAM and Reset the SMC, then try again.
Tried both - no change. Thanks anyway!
Have you tried with diffrent Cards????
There is known problems with the 'insertion' switch being dicky on the 2010/2011 models of iMac, Mini and MBP (I've got the MBP 2011).
I've had this too. Cleaning it worked for a while. Well not cleaning it, but gently inserting a toothpick and 'stroking the left hand side, bottom' of the slot unsticks the switch which registers the 'insertion and removal' of the card.
But the reboot is strange...
Is anything showing up in the logs? Use spotlight to find 'Console', under system files, look for system.log and you should see when the card is inserted and removed (for the first time after boot).
If you can spot the entries, make a note of them in textedit or notes, so you know what they look like, remove the card, wait a minute or two and reinsert it.. Go back to the log and what do you see?
Another issue is that some card manufacturers, make the cards slightly too short.... I've had a few of these too!
I had to literally push them in, and pull them out a few mm until they were found.
Annoying yes, but this is why standards are made 😀
COuld you give that a shot and see how it goes?
Yes, all the different cards I have. All will mount if I restart. Once I eject and re-insert, it won't mount.
I examined the system log as I unmounted the SD card (visible since a reboot) and found the information about the unmounting of the card. When I re-inserted the card, nothing happened. No further log entries. Here is the log (with an interesting error about the LSOF being 'left open':
Jul 28 14:05:31 marks-imac com.apple.SecurityServer[15]: Succeeded authorizing right 'system.volume.removable.unmount' by client '/System/Library/CoreServices/Finder.app' [171] for authorization created by '/System/Library/CoreServices/Finder.app' [171] (100013,0)
Jul 28 14:05:31 marks-imac com.apple.SecurityServer[15]: Succeeded authorizing right 'system.volume.removable.unmount' by client '/usr/sbin/diskarbitrationd' [16] for authorization created by '/System/Library/CoreServices/Finder.app' [171] (100002,0)
Jul 28 14:05:31 marks-imac mds[40]: (Error) LSOF: File '/Volumes/CANON_DC' (fd=10) left open on device 16777221
Jul 28 14:05:32 marks-imac com.apple.SecurityServer[15]: Succeeded authorizing right 'system.volume.removable.unmount' by client '/System/Library/CoreServices/Finder.app' [171] for authorization created by '/System/Library/CoreServices/Finder.app' [171] (100013,0)
Jul 28 14:05:32 marks-imac com.apple.SecurityServer[15]: Succeeded authorizing right 'system.volume.removable.unmount' by client '/usr/sbin/diskarbitrationd' [16] for authorization created by '/System/Library/CoreServices/Finder.app' [171] (100002,0)
I think this is the solution (it was for me):
http://www.cqdx.ru/ham/do-it-yourself/sdhc-card-reader-problem-in-apple-mac-comp uters/
SD Card Reader only works on restart
