Memtest OSX is simply the best ram-testing utility for the Mac with the ability to find intermittent memory problems that are the frequent cause of unexplained crashes and freezes. Memtest can identify random memory problems that commercially available utilities miss including defective motherboard CPU cache memory.

New features in version 4.22 include:
• Addition of a quick option to shorten the total run time. This feature is still under development so the improvement is only slightly better at this time. Future versions of memtest will improve performance significantly when using the quick option.
• When the user chooses to write out a log file to disk, memtest now reports the full unix path in the header messages. This should resolve the confusion over where the log has been written.

License: There is a fee of $1.39 for memtest version 4.22

Requirements:
OS X 10.3-10.5
Universal Binary