Read the mac fix it forums! This math library should NOT be used when doing highly sensitive math operations, supposedly the math comes out slightly wrong when using this extension, however... :) According to the documentation AND Norton System Info, this extension almost multiplies by 1.5 these math functions: sqrt, almost doubles sin and cos; and triples arctan and log. Only those computer operations that use these math functions will benefit. Guess what this halves rendering time of? Displaying JPEGs and SETI@Home, because both use a fourier cosine transform. That's right p*rn at double the speed by just instaling a system entension. ;)