I just successfully installed TT Business 2005- it's different from TT basic, as it's for partnerships, etc., in my case a 1065 filing. This was available in Mac form until some years ago. I followed the same tips as suggested for TT, first installing a W2K bottle, then IE 6.0, even though Crossover gave me a "likely to cause errors" notice. It upgraded from Intuit, and so far is running normally. Yes I know I'm a year late, but I will be trying TT Business 2006 shortly.