My intel dual core mac is not getting any more comp errors but the nbodys are are using 1.95% of my cores. Is this something new?

That's not 1.95%, but 1.95 processors. There's a new multithreaded N-body which should be a more effective use of a CPU than running an individual N-body on each core. BOINC tells the application how many threads to use, which in this case would be 2. The OpenMP one is also right now only on OS X; Linux should be soon and then Windows if I can get it to work.

Also I had aborted all tasks on my i7 920, and downloaded the new work units. They got to 32 hours and then went to comp error. So I aborted most of them and kept 8 to see what happens to them.

How recently? It seems your errors have been removed from the database.
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Thanks for the answer on the core usage. Work is getting done faster on the Mac.
On the i7 I aborted all work units 47 hours ago. The 8 I kept 3 had comp errors the other 5 are currently at 47 hours with anywhere between 2 and 19 hours to complettion. Will see what happens if I want to undo NNT on this rig.

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