Memtest86+ on Intel Mac
As the name suggests, Memtest86+ is a very thorough memory
testing program for x86 computers. With slight modification of a patch
for the Grub bootloader, it
will run on Intel Macs.
Here is a patch against memtest86+ 1.70,
or a prebuilt .iso image. I've be
interested to hear how it works on other Macs, especially those with large
amounts of RAM.
Updated 9 July 2007 to skip the bottom ~1.2MB of memory to avoid spurious
Keyboards don't seem to work with Memtest86+ on Intel Macs.
Supposedly booting via rEFIt might
help, though it didn't work for me. I can't see any obvious way that
Memtest86+ differs in its keyboard routines to say a Linux kernel, which works
fine. Anyone got suggestions?
While it seems to work fine on my machine, I provide absolutely no warranty that
this software is safe to run (as per the GPL).
This version has been modified to skip the first ~1.2MB of memory. Apple's
Boot Camp BIOS emulation doesn't mark this memory as unusable, but it seems to
be used for system purposes (the numlock LED will blink, and you'll get
spurious errors). The -1 patch didn't skip that, the -2 patch does —
this should make the newer version more useful.
The memory speeds are wrong and vary each run. These are purely informational,
so it doesn't matter.
Proof! It worked first time:
9 March 2007
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