I'm just trying to figure this out and see if I'm just missing something. I have a Panasonic DMC-TZ4 that I use for both pictures and video. I have a 1 gb SDHC card that has worked fine connecting to my Macbook (last white middle model, late 2008) via my generic 23 in one card reader. However, today I purchased a HP 16 gb SDHC card and it won't read on the Macbook at all. My camera uses it and acts as normal, but the drive won't even show on my Mac. I attempted to use the card reader in Windows XP Pro via Parallels, and the same thing happened. In fact, I got an error stating that the USB device had malfunctioned. The card reader IS old. Maybe it's having trouble with the higher capacity? I'm going to try the cable that came with my camera, when I can find it. I may need to try a new card reader as well? Any advice/suggestions you guys could give me would be GREATLY appreciated! Thanks in advance!