Never mind. I found the problem.
I just installed SAC 101.6a on my Mac running Mavericks. When I start SAC, I get the error
[97]:yangmp:xyang:% /usr/local/SAC101.6a/bin/sac
ERROR 108: Number 108 /usr/local/sac/aux/messages /usr/local/sac/aux/csspickpref . readcss will not read picks.
ERROR: Number 901 in INITCOMLISTS.
Problems opening Command List: /usr/local/sac/aux/clstd
David
Correspondence/TSPA