For those of you running PPS Sieve on the ATI GPU in your Mac -- or rather those who would like to do so but are unable -- we're aware that it's impossible.
Unbeknownst to me, apparently the server hasn't been sending these tasks out for quite a while. That can be fixed, and you can circumvent this problem using app_info.
However, unbeknownst to any of us, the sieve app itself stopped working at some point. It doesn't work with the most recent version or versions of OpenCl. This is the more serious problem.
It's our goal to fix this and restore this app to functionality, but I don't have any estimate of how long this will take.
A special thanks to everyone who has helped with diagnosing and debugging the problem. I'll keep you informed when there's progress.
My lucky number is 75898524288+1