Is there a way to give OS X the usual X-windows behavior where selecting text in any application automatically copies it to the clipboard, and the middle mouse button automatically pastes it?
+C, +V is a little annoying.
MacOS – Copy-on-select, paste-on-middle-click on Mac OS X
copy/pastemacos
Best Answer
This has already been discussed (and answered) on apple.stackexchange.com. The accepted answer in that discussion was to use Better Touch Tool.
However, all those solutions that suggest using some tool to map a mouse click to Cmd-V do not completely mimic the behaviour of X, where you can have different content in the mouse-controlled buffer and the keyboard-controlled buffer (i.e., you can paste two different strings depending on whether you middle-click or press CTRL-V).