When I switched from Linux notebook to MacBook Pro I really missed insert key. I don’t need insert in OS X, but it’s useful for remote work (for example on linux machine). I found on the Internet some tips like fn + enter to emulate insert, but nothing works. I realized I don’t need insert in whole OS X, but only in application used for remote work. In my case it’s iterm2. So here’s quick tip how to emulate insert in iterm2.

Go to iterm preferences ⌘ + ,. Click on Keys and add new keyboard shortcut (plus button near load preset button). Press your desired keyboard shortcut (for example option + F12) after that change Action to Send Escape Sequence and fill Esc+ with [2~. After that you can emulate insert key with your keyboard shortcut.