I bought the (Premium 2017 software) last week to use on my MAC. I can't save my return as I have done on previous years software. I can't close the program as I close any other program on this computer. I am hoping future update will correct these problems soon.
You can buy the software, attempt to do your taxes, may be successful; but only after updates that can take days or weeks. I'm still waiting on an update to file my State taxes. Federal was filed, but had to wait for days for an update to do that. Not impressed.