The card reader works without any technical problems on my Mac.
After driver installation you can on Mac such as online read his cash card / charge (with suitable browser plugin).
What is denounced here by many Mac users is that the "AusweisApp" is not working.
I can confirm that.
I can not manage, despite the current driver (v1.11.0 for Mac) to use Firefox ESR and currently AusweissApp current functions of the NPA at the Mac - it is happening with me simply nothing when I visit a site that wants to read the card ( tested with My Schufa and DKB account opening with Firefox 17 ESR).
After a short search, I came across the "openecard" project.
This client everything works fine. The client is platform independent - works with the offered plug-in Chrome (according AusweissApp FAQ technically be impossible with Chrome for sandboxing).
I think the resentment of Mac users here should not be directed against the manufacturer of the hardware (which I can not judge how the situation before 08/2013 which concerns drivers etc. was). Because the real problem is the software (in the form of "AusweisApp") on the hardware manufacturer might have think I only very limited influence.
After the "openecard" project is open source (source code is on github) one can only hope that the developers of "AusweisApp" there looking around and are willing to learn ..
A star deduction there because I think that for this price, the hardware should be better processed (the buttons have a spongy pressure point arg).