@R = sort @D;
@G = sort <op/*.t>;
+@G = sort <:op:*.t> if $^O eq 'MacOS';
if ($G[0] =~ m#.*\](\w+\.t)#i) {
# grep is to convert filespecs returned from glob under VMS to format
# identical to that returned by readdir
@G = grep(s#.*\](\w+\.t).*#op/$1#i,<op/*.t>);
}
-while (@R && @G && "op/".$R[0] eq $G[0]) {
+while (@R && @G && $G[0] eq ($^O eq 'MacOS' ? ':op:' : 'op/').$R[0]) {
shift(@R);
shift(@G);
}