The lack of a reliable piece of personal finance software for the Mac represents a serious gap as well as a significant opportunity.
Those who never record a transaction in a foreign currency can possibly make do with Quicken, though the Mac version draws a lot of criticism. Others, for instance anyone who has used a credit card abroad, will not be served. This is even more true of anyone who uses multiple currencies on a regular basis, e.g. many business travelers, expatriates, person living and working close to the border with Canada and Mexico, many Brits, Swiss and other Europeans not in the Euro zone, etc.
The only existing package that comes close is Liquid Ledger
www.liquidledger.com, a severely under-resourced product by an individual developer. This package has improved over time under the prodding of a number of dedicated users. Still, for now it only meets basic requirements. Besides, there are performance issues and the latest release is so full of bugs that most users seem to shun it. Alas, the developer now seems to have abandoned the product altogether. With the exception of four posts in October, he has not posted to the user forum since early June 2008, leaving many users in the lurch. In addition, several updates he announced are still pending.
As far as I know, Liquid Ledger is the only product with a data model that will support the functionalities required by anyone using multiple currencies. To the best of my knowledge, it is the only product on any platform to do so. In particular, the multi-platform Moneydance, its nearest rival, will not. Thus with good support Liquid Ledger has the potential for providing Mac users with a personal finance package that will satisfy even the needs of those with multi-currency requirements. At the same time, in view of the absence of any comparable product regardless of platform, it could provide a competitive advantage to the Mac.
There may be an opportunity to buy out the developer - rather than starting over again from scratch - given that he has apparently abandoned his product. In any case, there is an unsatisfied demand within the Mac community for a good personal finance package, in particular one capable of handling multiple currencies.
The Omni Group ought to consider the business case for addressing this need.