Cluto on Mac

I'm trying to use the newest (experimental) version of Cluto to cluster a 20K by 20K matrix on the lab's dual Quad core Mac running OS 10.5. I am getting a memory allocation error if I try and process the data with Vcluster. The request is for 1.1 gig of memory and the system has 14 gigs free. If I try the same data set in Scluster I get a segmentation fault.

I was wondering if you have any advice. Has this version been tested on newer macs?