Download of csTimer+ 1.3.3 for Mac was available from the developer's website when we last checked. We cannot confirm if there is a free download of this app available.
According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. The application lies within Productivity Tools, more precisely Timekeeping. This free Mac app is a product of Mateus Melo.
From the developer:
csTimer+ is the official csTimer+ extension for Safari. With this extension, you'll be able to enjoy a great csTimer experience. You can unlock new features like partial scrambles, multi puzzle image view, new inspection voices from your favorite cubers, and many more.
You may want to check out more Mac applications, such as TimeMachineGrowler, BigBen or SimpleDateCalc, which might be similar to csTimer+.