Yosemite and Teac A-H01 sound driver- alternatives?
I have same issue, contacted Teac support and recieved the following

Thank you for contacting TEAC-Audio.
Our engineering department is currently working on this issue. Please be so kind to check our webpage periodically for further info, or a possible driver update.
Thank you for your understanding.
MfG / Sincere Regards
Jürgen
Customer Support
TEAC-AUDIO Europe
Liegnitzerstr. 6
D-82194 Groebenzell / Germany
Tel.  +49-(0)8142-4208 141