Be careful if you buy SIIG-based ExpressCard/34 technology and you are using Leopard (Mac OS X 10.5.x). It may not work.
I specifically bought the eSATA II 2-Port ExpressCard/34-M, Part #: SC-SAEE22-S1 desiring 3.0Gb/s transfer speeds for video. However, the product and driver doesn’t work with Leopard.

Since the system requirements state that the product will work on Mac OS X 10.4.6 or newer (i.e., on the box and on the website the last time I checked), I inquired about the lack of support from SIIG. The response from SIIG:
Hi,
We do not have another driver for Leopard for this expresscard. Nor do
we think it will work in Leopard. We are working on a different
version expresscard for Leopard, however, it won’t be available for at
least 3-4 more months.Please return this product to your vendor for refund,
Regards,
Although disappointed, I am happy that SIIG was straight-forward.
I’m looking for a current product that will work with Leopard. If you know of one please drop me a comment! If I find one I’ll update this entry later.
Tags: Eric O’Laughlen, Mac OS X Leopard and eSATA II ExpressCard/34
