At present, the Network version of TaxCalc for practice users can only run on Windows based Server, although you can utilise Mac and Linux machines as clients connecting to a Windows machine acting as a TaxCalc server (or CloudConnect).
We are currently working towards releasing a version that will be supported as a server on both Linux and Mac however we do not have a timescale as to when this will be available.
If you want to be kept up to date on plans for a network version of TaxCalc for Mac and Linux, contact our Support team and we'll keep you informed of progress.