Mozy for Mac has been a nightmare for me. I have a very high-speed DSL connection, a new MacBook Pro, and Leopard. I also used it on a Powerbook running Tiger. My first tech support request, which came within a day of using it, went unresponded to for about 5 days. That was not the only time an inordinate delay for tech support occurred. But the main problem was, the software just did NOT work! I signed up at the end of January, and here in early April, Mozy has not succeeded in backing up my 60 GB of data! I have had it running several times daily. The software kept quitting, or connecting but failing to actually upload anything. I exchanged email with multiple tech support people, and went through about 5 upgrades, each upgrade promising to fix the problem that was stopping me from uploading data. I cancelled today after an upgrade to the most recent version failed to work at all, despite several uninstall/reinstall procedures. IMHO, Mozy for Mac is not even reliable enough to qualify for a Beta test status. I do personally know ONE Mozy for Mac user for whom this actually seems to work. He is happy. But it seems possible from internet reviews that he is in the minority. In response to my repeated attempts to problem-solve for Mozy, they extended my contract by 2 months, for free. But I found that the amount of time I was spending trying to get Mozy to work was not worth "free," even. Good luck to Mozy, and I hope they get their sluggish technical support times improved, and that someday they have a product worthy of marketing to the Mac community. We Mac users expect better.