What are the prebindings ? A found a simple tool, a GUI for a terminal command, updating prebindings. For what I have read, this updating seems necessary to optimize OSX prebindings and third-party software prebindings. What arre they exactly ? NB 1 : the tool is called System Optimizer X. NB 2 : Admin, if you think it's a too much "unix" question, move this post, I won't be ashamed !