We work on Macs. We have been tracking time in FunctionFox on line, which seems to work fine, and have been invoicing with Excel. In talking with Quickbooks, we would need their Premier version to do this in Quickbooks, and that is only available for PCs. Are their other well known systems that would prepare and track invoices? (Many people suggest loading windows operating system onto our computers and using a PC based product, but that seems like incredible overkill for such a basic problem.