-[ "Mac->catdir('','d1','d2','d3')", $root . 'd1:d2:d3:', 'MacOS' ], # skipped on other OS
-[ "Mac->catdir('',':','d1','d2')", $root . 'd1:d2:' , 'MacOS' ], # skipped on other OS
-[ "Mac->catdir('','::','d1','d2')", $root . 'd1:d2:' , 'MacOS' ], # skipped on other OS
-[ "Mac->catdir('',':','','d1')", $root . 'd1:' , 'MacOS' ], # skipped on other OS
-[ "Mac->catdir('', ':d1',':d2')", $root . 'd1:d2:' , 'MacOS' ], # skipped on other OS
-[ "Mac->catdir('','',':d1',':d2')", $root . 'd1:d2:' , 'MacOS' ], # skipped on other OS
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