memtest86(+) not working on MacBook Pro 8,3 17" 2011? When i run memtest86 or memtest86+ on my MacBook Pro 8,3 2011 17" 2,5GHz the machine reboots after a few seconds. I tried 3 different pairs of ram modules. problem persists. I never had any issues running memtest86(+) software on various Macs.

I wonder if this problem is related to this MacBook model in general or if there's some something wrong with the machine. (Yes it already has the new Logicboard)
I had the same weird behavior on a 17" Macbook Pro (Late 2011). So this is probably not a sign of trouble. I wanted to be sure that the memory was actually OK, and I remembered that there are two versions of memtest86:
memtest86 (by PassMark, memtest86.com) and memtest86+ (GPL from memtest86.org)

The Passmark versions seems to have more active development at the moment. I gave it a try, and it actually works on the MBP 17"! Be sure to boot in in EFI mode, otherwise an older version of it will start which exhibits the same reboot behavior as the memtest86.org version.