I have been buying Tax Cut for over 10 years. I love the ease of use and great value. Never have to worry about if it is up to date. They always stand behind their product.
Used H&R in the past, and was always happy. This year, the updating process via the program did not work and I had to go outside the application to get updates. I hope in the future you can develop the program to be able to simply update from within the program for Mac OS.
Have been using Tax Cut/HR BLOCK since 1986 with the exception of 2 years I tried Turbo Tax. Both times I thought HRB was easier to use and definitely was a better value.