I built Jam for the Mac starting from <a href=http://public.perforce.com:8080/@md=d&cd=//public/jam/src/&ra=s&c=mGq@//public/jam/?ac=83>here</a> and selecting link <a href=http://public.perforce.com:8080/@md=d&cd=//public/jam/&ra=s&c=4oi@//public/jam/jam-2.4.zip?ac=22>jam-2.4.zip</a> there and thence
<a href=http://public.perforce.com:8080/@md=d&cd=//public/jam/&cdf=//public/jam/jam-2.4.zip&ra=s&sr=1659&c=YZR@//public/jam/jam-2.4.zip>5</a>.
<p>To find command "jam0" I needed the command
<tt>export PATH=$PATH{}:/Users/norm/Desktop/jam-2.4</tt> but that wasn't enough.
Just now I suspect that jam 2.4 is not Darwin savvy.
<p>With the same modification to PATH, this worked on an x86 LINUX.
The unzip command worked there.
<hr>Link <a href=http://public.perforce.com:8080/@md=d&cd=//public/jam/&cdf=//public/jam/jam-2.5.zip&ra=s&sr=4409&c=9zg@//public/jam/jam-2.5.zip>4</a> found from this link: <a href=http://public.perforce.com:8080/@md=d&cd=//public/jam/&ra=s&c=EzB@//public/jam/jam-2.5.zip?ac=22>jam-2.5.zip</a> works in Darwin with no PATH problems!
At least I get an executable file "jam" in sub directory bin.macosxppc.
It issued warnings about incompatible implicit declaration of built-in function '_exit'.
It seems to run.