The computer I would like to run the GPU tasks on is a mac (Hackintosh) running OS X 10.8.2 and has a GeForce GTX 650 installed.
I can't get any GPU tasks from Genefer (long and short) or PPS (Sieve) to download. I've checked the settings both in the PrimeGrid preferences page and in BOINCManager and both allow for GPU tasks to run.
I can't seem to figure out why I can't get them to download. My best guess is because it's a Hackintosh.