testCard 3.7 for Mac was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. This free Mac application is an intellectual property of Sigma6.
TestCard for Mac lies within Design & Photo Tools, more precisely Viewers & Editors. 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.
From the developer:
The TestCard app is a small tool to display pixel perfect test patterns on any connected display. The default test pattern is a custom made design that suits your needs to caliber any type of display or video projectors. You can use it to check the position and distortion, and also colors, grays, contrasts and interlacing.
You may want to check out more software for Mac, such as TestCard App, which might be related to testCard.