People with Microtech ZiO card readers were overjoyed in early December to finally receive drivers that enabled these peripherals to work with Mac OS X, only to have their hopes dashed when, after installing the 10.1.2 update, the drivers promptly stopped working.
"Mike C., Certified Service Technician, macUpgrades" claims to have figured out a workaround. Evidently, the cause of the drivers' breakage was that the Mac OS 10.1.2 installer revises the IOUSBMassStorageClass.kext extension to a point where the drivers don't work.
His solution? Boot into Mac OS 9, copy the 10.1.1 version of the extension back into the appropriate directory, and reinstall the Microtech drivers. For some it appears to work, but others say it did nothing for them. Try it at your own risk. If you do go ahead, I highly suggest you keep the 10.1.2 version of the extension around.
Read the rest of the article for some more information on this problem and how to track Microtech's updates automatically...
If this is too risky for you, Microtech will only say that "the Mac OS X drivers for your Microtech USB reader were designed and tested in the Mac OS 10.1.1 environment. We understand that they are now not functioning in the newly released 10.1.2 update. Our engineering team is working diligently to correct this problem. We are sorry for any inconvienience this has caused and should have a solution for you shortly."
Whether you find this assuring or not depends on whether you believe their previous explanation as to the long wait for OS X drivers. They could use the same logic to have us wait until June, telling us after the fact that they wanted to wait until the supposedly more stable 10.2 was released.
You can ask to be notified via e-mail when a 10.1.2 driver is ready by going to answer ID number 794 on their support website. E-mails to their support address and phone calls to (800) 220-9489 do not do much good -- e-mail messages are being disregarded and their support personnel stick to the party line. The only extra information I could get was that the revised drivers were in the "testing stage."
Mac OS X Hints
http://hints.macworld.com/article.php?story=20020110103357764