I was having difficulty with the keyboard working with x2go 4.0.4.0 using X11 2.6.5 on OS X (specifically, the ctrl key was not working). Changing settings in the X11 preferences did not have any effect. Upgrading to XQuartz 2.7.7 appears to have resolved the issue for me. John Pellman Research Assistant Child Mind Institute 445 Park Avenue New York, NY 10022 e: john.pellman@childmind.org p: 646.625.4386 Facebook: facebook.com/ChildMindInstitute | Follow us on Twitter: twitter.com/ChildMindDotOrg This email message, including any attachments, is for the sole use of the intended recipient(s) and may contain information that is proprietary, confidential, and exempt from disclosure under applicable law. Any unauthorized review, use, disclosure, or distribution is prohibited. If you have received this email in error please notify the sender by return email and delete the original message. Please note, the recipient should check this email and any attachments for the presence of viruses. The organization accepts no liability for any damage caused by any virus transmitted by this email.