For the moment, Tails has very limited support for Mac.Also, Tails lacks UEFI support, so quite a few recent PC's refuse to boot from a TailsUSB stick.
We will be working on this in the next few months. However, our testing and development possibilities are limited: we do not own the right hardware yet.
We could definitely make use of several such computers. One item of each category is enough for initial development, but it would be much better not to rely on a single person for maintaining support of this kind of hardware.