You could have downloaded mCoreTest64 1.32 for Mac from our application library for free. This Mac download was checked by our built-in antivirus and was rated as malware free. This free Mac app was originally produced by XenForo Ltd. The application lies within System Tools, more precisely File Compression.
From the developer:
MultiCore & MultiThreads 64-bit CPU test for real (pack/unpack) task based on free 7z archivator. mCoreTest64 is a professional application that will unpack all of your 7z archives and it used the 64bit extension for a faster compression or extraction.
You may want to check out more software for Mac, such as Compress PDF, Password Zipper Lite or Pngyu, which might be similar to mCoreTest64.