My new A-DATA 8GB SDHC card works fine in my Canon SD800 camera, but wouldn't show up on my Mac desktop after I plugged it into my Sandisk MobileMate card reader. Enter the Sandisk MICROMATE, which turns out to have been designed to handle the newer, higher-capacity SDHC cards, as well as earlier generations of SD cards. The MicroMate is an efficient conduit between my A-DATA, Lexar, and Kingston cards on the one hand, and my Macs on the other. No drivers are needed -- it's all plug & play. The device has a little green light that powers on when the reader is inserted into a USB port. It comes with a transparent plastic cap that protects the USB plug; when you remove the cap to plug the MicroMate into your computer, the cap fits on and over the slot on the rear of the MicroMate (and over an SD card that you might have inserted there), so that you don't lose it. On a critical note, the cap also has an opening in its corner that lets you hook it onto a keychain -- an asinine design because if the reader detaches from the cap, you'll still have the cap but stand a good chance of losing the device itself. Other than that (and the caveat that this thing looks like it shouldn't cost more than ten or twelve bucks), the MicroMate is a nicely functional, able performer.