Downloading RankGuru 2.21 for Mac from the developer's website was possible 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 belongs to Internet & Network Tools. This Mac application is an intellectual property of Sandra Marisa Paoloni.
From the developer:
RankGuru is a simple OSX App that allows you to track easily how well your Website is performing in the major Search Engines: Google, Bing and Yahoo are supported. RankGuru stores the daily progress of your keywords. Slide your mouse over any keyword to compare the current ranking against the previous ranking.
You may want to check out more software for Mac, such as RankGuru SEO, which might be similar to RankGuru.