It took 3 calls to Intuit support to resolve this issue, but the last support person I talked to solved the problem.
The solution was to send me a separate license for the Mac version of Turbo Tax. I was able to download the Mac version using that code, and the Mac version is now listed in my downloads section.
Don't take "no" for an answer. The first two support people said that a user can only download the software for one platform. On my third call I asked to speak to a manager. When she came on the line I told her that there was a discussion thread on Intuit's forum that had over 25 pages of unhappy customers dealing with this issue. I also read the pertinent section of the End User Agreement that clearly says that a user can install the software on up to 5 computers. I think these facts motivated her to solve my problem.
