Is a personal and small-business financial-accounting software, freely licensed under the GNU GPL and available for GNU/Linux, BSD, Solaris, Mac OS X and Microsoft Windows.
Designed to be easy to use, yet powerful and flexible, GnuCash allows you to track bank accounts, stocks, income and expenses. As quick and intuitive to use as a checkbook register, it is based on professional accounting principles to ensure balanced books and accurate reports.
You Need A Budget:
You can connect to your bank and download transactions, and display those transactions and your budget in a simple, easy-to-understand interface that helps you determine quickly how well you're doing sticking to your budget and saving for your financial goals. YNAB is noted by a number of its biggest fans for not obfuscating your finances and its own tools like other tools: it's not difficult to just jump in and start tracking your money. You can try the app for 7 days free, but after that it'll set you back $59.95.
A free/open source, fast, simple personal finance app for Mac OS X.
An Application that lets you manage your personal accounts with ease. It also offers full synchronization between the Mac and iOS versions, enabling you to enter transactions wherever you go.
A finance app that approaches the problem of organizing your finances through simplified methods. It’s easy to enter transactions and repeat transactions, plus you get to see your progress through five different windows: Overview, Daily, Categories, Budgets, and Graphs.
Provides you with powerful tools to analyze, control and keep track of your spendings.
A powerful, comprehensive, and intuitive system designed to help you keep control of your financial life. Oversee your account balances, track investments, keep budgets, and manage your bank accounts, credit cards, loans, investments, assets, and cash.
Please note however that many of the Apps mentioned above are Premium products and not freeware.
A comprehensive list of financial Apps available for Mac users can be seen here.