Hi, I get the following problem when running cssh. My mac is of version OS X 10.9.5. Does anybody know what the problem is? Thanks. $ cssh machine1 machine2 Can't connect to display `tmp/launch-KZPKti/org.macosforge.xquartz:0': Invalid argument at /opt/local/lib/perl5/vendor_perl/5.16.3/X11/Protocol.pm line 2270. -- Regards, Peng