I just bought my first digital camera—I know welcome to the 20th century. I am using an iMac that is about 2 years old or so, without a built-in SD slot, running OS 10.6.8 and I cannot get it to recognize a SanDisk 8gb SDHC card. I am using an external card reader which lights up, but I can't find it anywhere on my computer, it's not on the desktop or in Utillities. I have tried restarting with and without the card in the reader. I have zapped the PRAM. I don't quite know what else to do except start screaming—which may or may not help. I've searched the web and this seems to be a somewhat common problem, and I've tried much of what other people said helped them, but no luck. Any ideas????