This versions of DDLAB was complied for Mac OSX, 32-bit, and includes Null Boundary Conditions. Run from a terminal in X11, which must be installed. ddlabx10_mac32.tar.gz will unpack to give ddlabx10_max32 and this readme. To run DDLab, from a terminal in X11, from the directory with the DDLab files, enter the name of the executable preceded by ./ and followed by & ./ddlabx10_mac32 & Alternatively, first change directory to "ddfiles" then enter the name of the executable preceded by ../ and followed by & This will keep files generated by DDLab in the ddfiles subdirectory. ---------------------------------------------------