I am searching for a keyboard shortcut that allows me to combine 'Cmd-t' (open new tab) and 'Cmd-click on a symbol' (jump to definition). I want to be able to open the symbol definition in a new tab, much like Cmd-click (Ctrl-click on Windows) opens a link in a new tab when using a web browser.
I tried some different combinations but have given up after Cmd-option-Shift-click crashed Xcode!
I'm currently using Xcode 4.6.1.
Now command-double-click the symbol to open in new tab.