Apple MD094LL/A Manuel D’Utilisation

iMac (27-inch, Mid 2010) Symptom Charts — Mass Storage 

 2010-09-09

Unlikely cause: LCD panel, logic board, optical drive, hard drive

SD Card Not Recognized
•  Card does not show up on 

desktop or in System Profiler

1.  Insert user’s SD card into a known-good system 

and verify that it functions properly. If card 

cannot be read, contact card manufacturer for 

support options.

2.  Verify SD card slot with known-good SD card.
3.  Check correct drivers are installed for user’s SD 

card type. Standard SD cards are supported by 

Mac OS X, but others may require specific driver 

software to be used.

1.  Verify if SD card inserts 

correctly in SD slot.

Yes

Go to step 2.

No

Go to 

 symptom flow.

2.  Unlock and insert user’s SD 

card and verify it shows up on 

desktop or in System Profiler.

Yes

Go to step 6.

No

Go to step 3.

3.  Insert a known-good unlocked 

SD card and verify if read/write 

capabilities are working.

Yes

User’s SD card not functioning 

properly. Contact card 

manufacturer for support.

No

Go to step 4.

4.  Run System Profiler and verify 

if SD card reader is now listed 

in USB devices.

Yes

Go to step 5.

No

Reseat SD cable at SD board 

and logic board

If issue persists, replace 

SD reader cable. 

 

If issue persists after cable 

was replaced, replace 

SD reader board.

If issue persists after card 

reader was replaced, replace 

logic board.