iBank for Mac
This is excellent accounting software for Mac. As I need to manage my bank accounts and investments in both the UK and the US and submit tax returns for both countries (each with different tax years) - things can get a little complicated. I needed help, and a friend recommended iBank by IGG Software. It's perfect for my situation, primarily because you can create accounts in different currencies. I can set the date parameters for UK (April-April) and US (Jan-Dec) tax years and create expense reports for each. Then I just format the reports in whatever way my US & UK accountants require and send it off. It's SO much easier and speedier than how I used to do it - manually.