I was verifying JBIDE-22549 which was supposed to add support for Ctrl+C in JMX remote call results. This doesn't work for me on Mac. Right-click -> Copy does work though.

What I did was:
1. Start EAP 7
2. Connect in JMX Navigator
3. Go to MBeans -> jboss.as -> naming
4. Double click the mbean
5. Execute jndiView

In the result window, I am not able to copy anything using Cmd+C, but I can copy using right-click -> Copy.

I asked rhopp@redhat.com to try this for me on Linux. But he got stuck on failed jmx connection of his local EAP 7 server (reported here: JBIDE-22761). And then I tried a similar thing in the Properties view and it turns out that I can't copy there either. Then I asked Radim to check that and he confirmed he cannot copy from Properties view using Ctrl+C on linux.
Then I tried some more and noticed that in some occasions I can do that:

For example if I select the active JMX connection in JMX Navigator, go to Properties view, expand Memory and select a row, I can copy with Cmd+C. But if I select an MBean and then click a row in the Properties view, I cannot copy with Cmd+C.