Memtest 4.23 for Mac can be downloaded from our website for free. This Mac application was originally produced by Frisky's Software Development.
From the developer:
This small command-line utility thoroughly checks available memory under OS X. Memtest is licensed under the Gnu Public License and is distributed with source code. This program was originally authored by Charles Cazabon for Linux platforms and the MacOS X port is maintained and enhanced by Tony Scaminaci.
System Optimization