Mac to PC cannot import investments?

No one has come up with a way to do it.

I'm going to through this out though.  If one saved a report in Quicken Mac to CSV format for the investment transactions, it might be possible (but a lot of work) to import those transactions into Quicken Windows in QIF format using my program to convert them (ImportQIF).

Transfers will certainly be a problem, but it might work as long as the transactions aren't too complicated.
ImportQIF is free, and you can find here:
http://www.quicknperlwiz.com/

If you attempt it, it would be interesting to hear how it went.