You could have downloaded plistcheck 1.0 for Mac from our application library for free. The program is categorized as System Tools. The app's installation file is commonly found as plistcheck.zip. The most popular version of plistcheck for Mac is 1.0. This free Mac app was originally designed by Charles Edge.
From the developer:
plistcheck is an application that checks preferences (aka – property lists) to make sure that they are properly formatted. The application displays a report listing any problems it found in the Info.plist file. This easy-to-use program lets you browse for a .plist file and it will show you the file status.
You may want to check out more software for Mac, such as PlistChecker or InfoPlistChecker, which might be similar to plistcheck.