Why CUDA keeps crashing

CUDA on computer keeps crashing in the past weeks, I run the “deviceQuery” and it shows “There is no device supporting CUDA”.

Actually I have reinstalled the toolkit and driver several times, after each installation CUDA can be used, then after one reboot or two it fails again.

Anyone who knows what’s wrong ???

PS: Mac OS X 10.5.7, GTX 285 for Mac Pro

OSX installers are apparently hard:


Thx, I will try