VT software and Macs

I have just tried to get a new client to download VT Cashbook software. She cannot install it because she uses an Apple Mac computer which, I have just found out from VT website, cannot be run on a Mac.

Is there any way around this problem? I vaguely recall a recent posting that mentioned installing VT in the cloud or via a hosting service. I'll do a bit of research myself but wondered if anyone had a quick answer or could point me in the right direction.

Many thanks.