Now days there is MUCH more POS software for a Mac than a PC, even in 2004. But there is nothing tanning-wise made for Mac.
However, you should be able to run Helios via Parallels. Its what I will be trying out this summer to see how well it works with the new iMac I have.
http://www.parallels.com/
By the way, anyone who types MAC instead of Mac has no clue what they are talking about when it comes to the Apple platform. A MAC is a network address, a Mac is a nickname of the Macintosh line of computers!

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"John McCain said he'd follow Osama bin Laden to the gates of ****," said Sen. Joseph R. Biden Jr. "Well, let me tell you something: President Barack Obama will follow him to where he lives and then send him to ****."