Tic Toc for Mac (US$4.99) from Overcommitted is a simple task timer that sits unobtrusively in your menu bar while you work. It's a great option for those who must monitor time spent on a task. There are no client records, project management features or support files. Simply create a task, start the timer and get to it. Here's how Tic Toc for Mac works.
Once installed, Tic Toc places an icon in your Mac's menu bar. Click it to create your first task. A slip appears. Give your task a name and click Save. The task then appears in a list which shows its title, most recent modification date and time spent on it over the last day and the last week. Click Start to begin timing.
The task's title appears next to the menu bar icon (you can turn that off).